Who else agrees that self moderation of ANN threads shouldn't be possible?
A lot of them are scams, and of course they'll delete your post when you call them out
Some users also come up with false(unsure)scam accusations, with no prove of default on the part of the project and a this stage it's the duty of the OP to rid the thread of such posts.
In my opinion if someone is totally sure of a project being fraudulent or a scam, rather than even trying to post on the said thread, it's wiser to open a new thread in the scam accusation board, that way it's your thread and the discussion on your own part will make more sense.