While its more restricting, we think having a low number of pre-set options would be safest. People will abuse it if they can upload whatever, because out of 2000, you can be certain that there will be at least 20 who are idiots in some fashion, probably more.

But there could always be the option for adding more choices with time. Perhaps a template for where the images need holes, then a nice little committee to argue over which are appropriate to add, with Mahz having the final veto option (which probably wouldn't need to be used).