I have to agree with Schultz and Cav. The diplomatic route is the best one to take. I live in California, but I'm originally from the Chicago suburbs, and I am familiar with how uptight Lake/Cook/DuPage county folks can be. Being confrontational about it is just going to sour any good relations you have, make you look like a jerk, and may get you dejobbed pretty quick.

I wear the kilt daily to work, and I even wore my Thompson USAK when I spoke before the Los Angeles school board last year. But I'm protected by a pretty powerful teachers union, I maintain good relations with the principal, and I began wearing it in a way that didn't shove it in anyone's face. I wore it for me, wore it with pride, and while I didn't take any crap from anyone, I didn't give any out, either.

Bring some snapshots in and show them to your boss. If you approach it in a professional way, probably nobody's going to care one way or the other.