I am a 23 year old guy, but I'm also 240 and "shaggy". I don't think I look anything like a cop, and I OC all the time. I usually get nothing more than a glance or two. I think you have very little to worry about, honestly. The best tool I've found is the pamphlets that have been created about OC. I keep several of these on me, and I find they do a better job than I can explaining about the laws and such regarding OC. There is a post somewhere on the forum here that has them attached in PDF format, so they are easy to download and print. But honestly, once you start OCing, you'll be surprised how many people DON'T know you're even carrying. Once you've been doing it for a while, you'll get comfortable with it, and that's the most important thing. If you think you are 100% OK with what you are doing, then others pick up on that body language and assume you are OK too.