Yes this is a touchy one mainly with countries negotiating on the TPP bill that even have it the way its worded that fanartist can see criminal charges. The cosplay world is seriously worried as the pharmaceuticals, automotive industry etc. Look it up the new Trans Pacific Partnership bill will be more stricter than the copyright as it is now. With this bill the government would be able to go after the supposed offender even though the creator didn't file a claim against you. It's made it to Congress but people are hoping it doesn't pass. Basically it's saying no imitation, derivative and whole lot of stuff. The TPP bill is suppose to be the universal copyright among numerous countries. They are trying to talk about it as minimal as possible as not to have people challenge this bill.