I never pretend to like anything. If fans of X can't handle the existence of one person who openly professes apathy for their chosen obsession, that's their problem.
This is especially true for sports fans. There's an arrogance among sports fans you don't get with many other fandoms. Somehow, sports fans are allowed to assume everyone else is interested. At my job I am regularly asked for my thoughts on baseball or football (in other nations I imagine it's soccer or what-have-you, but here in 'Murica it's football and baseball) by people I've never met before.
Nobody would do this with, for example, a huge summer blockbuster. Never mind that millions of people saw it. No stranger would come up to you and say, "So have you seen Skyfall? What did you think?" It just doesn't happen.
Yet they can and will ask about the game.
My thoughts are always the same: "One group of arrogant, overpaid, steroid-popping Neanderthals is going to play a little better than another group of arrogant, overpaid, steroid-popping Neanderthals who just happen to be wearing different-colored shirts. If you replaced all the uniforms with, say, orange prison duds, no one would give a fuck anymore. You're a fan of the color of shirts worn by total strangers thousands of miles away. I would barely be aware of pro sports at all if people didn't keep talking to me like it mattered."
I don't say this, of course, but there's a difference between not speaking my real thoughts and pretending to actually like sports. I usually just say I don't follow it. Occasionally this response is met with total incredulity: How can anyone live a full and satisfying life that doesn't involve an obsession with sports? It's these morons who really piss me off.