Where am I and what am I doing in this handbasket?
Is it possible she missed the rule change where eventing/dressage lined up with the USEF ammy definition? There were more than a few people busted by that change in the first few years after the change. I think some of them were just clueless instead of intentional (and some were not clueless at all), but a failure to read rules is never going to win your case.
Your crazy is showing. You might want to tuck that back in.
Cheating is gross regardless of the level/ ability of the cheater. Running a camp does not automatically make her a pro unless she teaches at it-- training rides (any rides on horses she is paid to care for) do. Does she advertise her services in print/ on the website? I would absolutely either speak to her about it-- if you think she doesn't know the rule-- or report her if you have proof that she's a professional. Otherwise there's not much you can do. Obviously you do care, or you wouldn't have posted this thread.