Demand that violent dogs not be permitted to become Emotional Support Animals

I'm sure this going to ruffle some feathers, but oh well. I have a legitimate service dog not an ESA and I recently moved in with a friend who's stepson has a pit bull who is an ESA and the dog has attacked my service dog several times along with a smaller dog that also lives in the household. This isn't the first time I've come across an aggressive dog that's an ESA! This has got to stop. It's not fair to the people who have actual service dogs or dogs that are non aggressive ESA'S