Oh I see! I thought posts were scrutinized before they qualified into activities and thus when the posts become activities they are permanently fixed. Does that mean previous posts/activities you made in say a month ore more ago can still be deleted ? And is there a special way to keep track of deleted posts ?
Any post against the rules can be deleted if it's caught by a member of staff or reported by a user here. Dosen't matter if it was a day ago or a week ago. If a post is deleted a message is sent to you, if a thread is deleted then you get no message.
There isn't any way of looking at your previously deleted posts, unless you have received a message via personal messages. Just put some effort into your posts and don't break the rules and you won't have to worry about losing activity.