I often watch what I say when speaking about Linux and Windows, especially when comparing them, so that I don’t sound what’s termed as “anti-Microsoft” or “anti-Windows”. Experienced free software advocates will often tell you that sounding too aggressive against Microsoft will put people off, and they won’t always take you very seriously.
Even though I’ve always tried to be quite diplomatic towards Microsoft when dealing with their clients, some people still had the nerve to call me anti-Microsoft. I’ll go as far to admit that I am anti-Microsoft, but in the circumstances that I’ve been called anti-Microsoft, I’ve been more diplomatic than is even required.