I've only ever gotten one warning, and that was for using the phrase "U mad?" commonly used in trolling. Although, I didn't mean the phrase in a trolling way, I was just inquiring what made the poster (who was my rl friend) take so long to reply. Nevertheless, it was a reminder, and I felt I deserved it even if just for that.
I've never had a low content post warning, or any other type of warning at all. If I have too little or nothing useful to post at all, I won't. Frivolous posting belongs on the Forum Games.
I don't see anything wrong with these forums other than the rigid rules making everyone a little, erm...hoity-toity. Sometimes I wish I could make a dirty joke without it being ignored for fear of moderator wrath or without killing the thread...