Question is, how often newbies create such a quality content that them posting images cause huge inconvenience on mass scale?  From what I could see in my time here on the bitcointalku forum, situations like that doesn't happen sometimes often

Regarding your examples from that anniversary contest, that was heavily abused and there were
many alt accounts made just for that purpose,trying to get either money or easy merit.

I was newbie user not so long time ago, and I don't remember being annoyed by inability to post images. On the contrary, I've even saw it as some kind of reward for reaching Jr Member rank, and I wouldn't be surprised if other newbie accounts felt the same.