30 mins wait after changing it? A lot of people do show things by using gang pics so don't want to be waiting an hour to show 2 things. Also how would you get people to check them? People lie about their age and it would be hard to know who to trust.
I understand why this is happening but it does seem a bit like a few people ruin it for the rest of us. The idea of it being logged and checked daily does seem like the best answer.
Also 1 EC wont keep everyone happy and getting paid each time they upload a pic would be too easy to make money.