Oh, boy. I agree. In business, it's best to hold your tongue.
There are two designers I don't support. One for her stupidity and the other because she said something offensive to me in a personal conversation. So, I know when you've branded yourself in association with a product that it's possible to offend some folks and lose their purchasing power for a while or maybe even forever.
I'm not sure what Jo said but I don't think that complaining about guilds would be damaging in a widespread fashion. I might be wrong. Am I?