Some people may call your pipe and top hat pretentious, but those people need to get with the program. You’re obviously making an ironic statement about the holiday season, and they just aren’t high-brow enough to get your sense of humor. Don’t worry though, for every 50 people who mistake your pipe and hat for hipsterdom, 1 person sees the humor and nods at you on the street, and that makes it all worth it.
Be careful, though; if you keep up the pipe and cap shtick for too long, eventually they’ll come back into vogue again someday (just like Frosty himself) and people will mistake your ironic attire for conformism. And we all know how you feel about conformists.