or admins can just check the uploads to make sure it isnt one you can buy. Maybe you have to email it to the admins. If they approve it, they upload it only for you. They can not approve it. That really solves the problem

i now had the idea that you have a maximum ammount of hats u can upload like 4 hats per person

so people should be able to make their own hats, email them to snk, then if he approves it, he uploads it for that person. (The only reason it wouldnt be uploaded is if it has anything innapropriate, it has copyright material, or if its a hat they already sell.) The person can only have 4 hats uploaded for themselves.