Just got a call in Indiana from a lady whose kid has a pit as a "service" dog. Thoughts on this? Can I still discriminate against the breed as I normally do with pits, rotts and so on even if they have papers?

Unfortunately I've been away for a few months while taking care of some personal matters, so I haven't been able to keep up on discussions. 
However, several months ago there were ample amount of folks here insisting...