Such as? Please provide examples, though they are likely breaking the rules.
I forgot my deleted posts and I already deleted them on my inbox, but I now I am considering it as nothing since it has been deleted. Hopefully my future posts will not be deleted and in return I am going to treat this as a lesson, because it really breaks my heart seeing my posts are being deleted 
Posts deleted from inbox? How is that?
Most probably threads were deleted and your posts too, I had such an issue once. Or you posted something really not needed so moderator deleted just your post.
Or, might be you even did´t posted them... Forum issue, internet problems and so on.