diff --git a/inquisitor/app.py b/inquisitor/app.py
index 3137810..bf70692 100644
--- a/inquisitor/app.py
+++ b/inquisitor/app.py
@@ -1,6 +1,7 @@
 # Standard library imports
 import datetime
 import logging
+import traceback
 
 # Third party imports
 from flask import Flask, render_template, request, jsonify
@@ -21,12 +22,12 @@ app = Flask(__name__)
 dungeon = dungeonlib.Dungeon("dungeon")
 
 
-def list_filter(whitelist=None, blacklist=None):
-	if whitelist is not None:
-		return lambda item: any([tag in whitelist for tag in item['tags']])
-	if blacklist is not None:
-		return lambda item: not any([tag in blacklist for tag in item['tags']])
-	return lambda s: True
+def make_query_link(text, wl, bl):
+	wlp = "only=" + ",".join(wl)
+	blp = "not="  + ",".join(bl)
+	params = [p for p in (wlp, blp) if not p.endswith("=")]
+	query = "?{}".format("&".join(params))
+	return '<a href="{1}">{0}</a>'.format(text, query)
 
 @app.template_filter("datetimeformat")
 def datetimeformat(value, formatstr="%Y-%m-%d %H:%M:%S"):
@@ -38,21 +39,61 @@ def datetimeformat(value, formatstr="%Y-%m-%d %H:%M:%S"):
 @app.route("/")
 def root():
 	dungeon = dungeonlib.Dungeon("dungeon")
-	filter_lambda = list_filter(
-		whitelist=request.args.get('only'),
-		blacklist=request.args.get('not'))
+
+	# Determine exclusion filters
+	filters = []
+	wl_param = request.args.get('only')
+	wl = wl_param.split(",") if wl_param else []
+	bl_param = request.args.get('not')
+	bl = bl_param.split(",") if bl_param else []
+	if wl:
+		filters.append(lambda item: not any([tag in wl for tag in item['tags']]))
+	if bl:
+		filters.append(lambda item: any([tag in bl for tag in item['tags']]))
+
+	# Get all active+filtered items and all active tags
+	total = 0
 	active_items = []
-	for cell_name in dungeon:
-		cell = dungeon[cell_name]
-		for item_id in cell:
+	active_tags = set()
+	item_read_exceptions = []
+	for cell in dungeon:
+		for item_id in dungeon[cell]:
 			try:
-				item = cell[item_id]
+				item = dungeon[cell][item_id]
 			except:
-				logger.error("Exception reading {}/{}".format(cell_name, item_id))
+				msg = "Exception reading {}/{}".format(cell, item_id)
+				logger.error(msg)
+				item_read_exceptions.append(msg)
+				item_read_exceptions.append(traceback.format_exc())
 				continue
-			if item['active'] and filter_lambda(item):
+			if item['active']:
+				active_tags |= set(item['tags'])
+				total += 1
+				if not any(map(lambda f: f(item), filters)):
 					active_items.append(item)
-	logger.info("Found {} active items".format(len(active_items)))
+	logger.info("Returning {} of {} items".format(len(active_items), total))
+	if item_read_exceptions:
+		read_ex = {
+			'title': 'Read errors',
+			'body': "<pre>{}</pre>".format("\n\n".join(item_read_exceptions)),
+			'created': None,
+		}
+		active_items = [read_ex] + active_items
+
+	# Create the feed control item
+	wl_minus = [make_query_link("only - {}".format(tag), [t for t in wl if t != tag], bl) for tag in wl]
+	wl_plus = [make_query_link("only + {}".format(tag), wl + [tag], bl) for tag in active_tags if tag not in wl]
+	bl_minus = [make_query_link("not - {}".format(tag), wl, [t for t in bl if t != tag]) for tag in bl]
+	bl_plus = [make_query_link("not + {}".format(tag), wl, bl + [tag]) for tag in active_tags if tag not in bl]
+	body = "<pre>{}</pre>".format("\n".join(wl_minus + wl_plus + bl_minus + bl_plus))
+
+	feed_control = {
+		'title': 'Feed Control',
+		'body': body,
+		'created': None,
+	}
+	active_items = [feed_control] + active_items
+
 	return render_template("feed.html", items=active_items[:100])
 
 
diff --git a/inquisitor/resources/feed.css b/inquisitor/resources/feed.css
index d76f799..0102814 100644
--- a/inquisitor/resources/feed.css
+++ b/inquisitor/resources/feed.css
@@ -36,4 +36,7 @@ summary:focus {
 .strikethru span, .strikethru p {
 	text-decoration: line-through;
 	color: rgba(0, 0, 0, 0.2);
+}
+pre {
+	white-space: pre-wrap;
 }
\ No newline at end of file
diff --git a/inquisitor/templates/feed.html b/inquisitor/templates/feed.html
index deb2bc5..6796bd4 100644
--- a/inquisitor/templates/feed.html
+++ b/inquisitor/templates/feed.html
@@ -26,7 +26,9 @@
 			{% if items %}
 			{% for item in items %}
 			<div class="readable-item" id="{{item.source}}-{{item.id}}">
+				{% if item.id %}
 				<button onclick="javascript:deactivate('{{item.source}}', '{{item.id}}')">&#10005;</button>
+				{% endif %}
 				{% if item.link %}
 				<a class="item-link" href="{{item.link}}" target="_blank">&#8663;</a>
 				{% endif %}
@@ -49,7 +51,11 @@
 				</span><br>
 				{% endif %}
 				<span class="item-info" title="{{ 'Tags: {}'.format(', '.join(item.tags)) }}">
-					{{item.source}} {{item.id}} {{item.created|datetimeformat}}
+					{{item.source}}
+					{% if item.id %}
+					{{item.id}}
+					{% endif %}
+					{{item.created|datetimeformat}}
 				</span>
 			</div>
 			{% endfor %}