Same thing happened to me a while ago when I used a play on words that included the letter B. It wasn't until someone had bumped it way after the fact that I was warned about it. I was upset at the time (I'm a goody two-shoes) but then realized that it really didn't affect me one way or another because I know I wasn't being offensive, and it was just someone else's perspective who happens to have thought I was. To each their own!