Well the anti-Linux fanboy or the MSFT fanboy is a pretty new thing. I don't know if they are being sarcastic, but there are plenty of places on the 'net you can find gatherings of such people. Just be careful, NSFW and all.
Could you point out one of these places? I haven't managed to find one of these MS fanboys who hates Mono, and I'd like to see how they justify their hatred.