It's not a big deal to me. There are so many other things to focus on, in my opinion. I've been in situations where I am going to be in a photo with members of other orgs. that share my handsign, and we actually get quite a kick out of it. It's all in good fun.
Whenever I do see members of orgs. get defensive about handsigns, colors, who's-first, etc., they are usually ALWAYS undergraduates (unfortunately).