Posts are generally deleted when mods thinks they are unworthy.
Exactly! I have never seen how mods will definitely just pick on a particular account or on some accounts and just simply start deleting their posts for nothing. Moreover, those mods are even very busy to keep doing that. The issue is that a lot of people simply do not understand the rules of the thread and some does not understand the difference between a shit post and a relevant post and in that case, it would be hard for them to get it.