Taking and Viewing Other User's Filters


```ruby
TickerItem.create! tracked_object: Article.last, actor: User.first, action: 'read'
#=> #<TickerItem _id: 5140007f310eb2d016000006, _type: "TickerItem", created_at: 2013-03-13 04:28:47 UTC, updated_at: 2013-03-13 04:28:47 UTC, tracked_object_type: "Article", tracked_object_id: BSON::ObjectId('50e1f7205243784be500014e'), actor_id: BSON::ObjectId('50e1f6fc5243784be5000026'), action: "read"> 
User.first.activities
# => [#<TickerItem _id: 5140007f310eb2d016000006, _type: "TickerItem", created_at: 2013-03-13 04:28:47 UTC, updated_at: 2013-03-13 04:28:47 UTC, tracked_object_type: "Article", tracked_object_id: BSON::ObjectId('50e1f7205243784be500014e'), actor_id: BSON::ObjectId('50e1f6fc5243784be5000026'), action: "read">]
```