It's not right, but you stand by it? They say you meet some reprehensible people on the Internet, but holy cow. What other evil acts to you stand by?
Imagine how this would work out in your neighborhood: The guy down at #5 finds some dog poop on his step. He's seen you with dogs a lot, so he asks if it was your dog. You respond that you don't actually have a dog, but that as a veterinarian, you often see dogs. The situation here is the same as if your neighbor came and accused you of letting your dog defecate on his steps every time it happened, even though he knows that it couldn't have been you.
In the real world, all societies need defenders who will protect them from the wild. A free society is predicated on those defenders being able to differentiate that which is suspicious from that which is actually hostile or criminal.