Sometimes I worry about that too. My baby isn't completely 100% yorkie so when people ask me about her or her breed I make sure to say that she is "mostly" yorkie so they get the hint that she is not an incredibly expensive dog. Even though she didn't cost that much she is priceless to me and I don't want anyone thinking they could sell her for a large amount. I get nervous when new people move in to the apartments right next to mine, even though I know my apartment is much much more secure than most. No matter where we are I just try to take every safety precaution I can and pray nothing bad ever happens. I don't think you're crazy...you just love your babies