Posts, in those type of threads, do get deleted on a regular basis M8, but sometimes, despite regular warnings by the members of Staff, it gets so repetitive that the only cure is to close the thread.
If you feel that a thread has been unfairly closed, you can PM the Moderator, or Admin, concerned and explain why you think it should be re-opened ... if your case is a good enough one, then the issue would be reconsidered