This is why I won't be participating in any breed boards if I/we should get a dog someday. I just want a dog. As long as he or she is healthy, I don't care whether or not he or she doesn't have a certain eye color or has a smudge of white where it should be tan.
The PyrShep groups and the main Belgian group are open to everyone with a PyrShep or Belgian (of any sort) from anywhere and no matter what you do with your dog.
I understand people who want BCs preserved as working dogs above all else. But I also understand people who want to compete with their dog in more modern games and want dogs from lines who are proven in those areas. I think there's room for everyone. I don't believe in more popular breeds that show/performance breeders are "ruining" the breed. If working BCs cease to exist, it won't be because of show/sport breeders but because the BC is no longer needed for work due to times and people's needs changing. As it is, the fact that there are show/performance or even pet bred BCs doesn't really affect the working population any more than American showline GSDs affect what working bred GSDs. The show/performance breeders outcross to working lines but the reverse is almost never true, so the idea that the show dogs would "water down" the working population just doesn't make much sense.