As I watch you encourage your child to engage with a working dog, even after the handler has asked you to stop, I cannot help but feel angry: angry that you, a stranger, feel that your child’s right to interact with a cute puppy dog is more immediately important than the handler’s wishes. I am angry that you would argue with a firm denial, even when it is given with respect and gentleness. I am angry that you are showing blatant disrespect for the safety and comfort of the dog’s handler. I am angry that you are teaching your child to disregard the proper treatment of service dogs. I am angry that you, as the parent, are refusing to live by example. I am angry that you are ensuring that service dog handlers everywhere will have to keep saying “please don’t pet the dog” indefinitely.

I understand: the dog is beautiful, and friendly, and a pure delight to touch. Your child adores dogs—probably, the dog adores children, too, and would welcome a little affection. You are a dog lover, and hate to deprive yourself or your child of the opportunity to indulge in a bit of doggie-interaction. You don’t want to disappoint your child. I’m a dog lover, too. I understand. But …

I’m here to tell you that it doesn’t matter, because you may choose an unsafe time to distract a working dog, thus inconveniencing or even endangering the handler. It doesn’t matter, because the dog has a million distractions to contend with already—dropped apple cores, other dogs, and tantalizing bits of popcorn—without sudden attention from a strange human. It doesn’t matter, because you should never touch someone else’s property without permission—and yes, the dog does count as property in this instance. It doesn’t matter, because you were told no. That, on its own, ought to be good enough.

Many of my friends are dog handlers, so I can guarantee that they don’t enjoy telling an eager child that they can’t touch the puppy. They don’t enjoy saying “no” three times a day. They don’t enjoy denying you the company of their dogs. They just want to get where they’re going without fuss, and the last thing they feel like doing is disciplining a complete stranger. They are not part of a conspiracy to ruin your fun. So …

Why do you do it? Why do you insist, even when you know better, upon continuing to violate another person’s space? Why do you continue to place handlers in awkward positions where they must discipline your child because you refuse to do so? Why do you care more about touching that sleek coat than you do about whether the handler makes it across the street safely? Why do you care more about your right to go to pieces over the cute doggie than another human’s right to autonomy? The dog is an extension of them, and when you touch the dog, you’re effectively intruding on their personal space as well.

If I placed a wandering hand into your stroller to give your child’s head a stroke, wouldn’t you be a bit nervous? If I reached over and grabbed your arm to say hello, wouldn’t you be annoyed? If I insisted on distracting you while you were trying to do an important job requiring vast concentration, wouldn’t you wonder where my manners were? So I will ask it of you: where are your manners?

Yes, we’re talking about a dog here, but that doesn’t exempt you from the rules of basic human courtesy. Maybe the dog would love to be stroked just now. Maybe the dog has had a long day and would love to flop down and have its belly rubbed. Ultimately, though, the dog has a role, whether that’s guiding a blind person, or alerting the handler of an approaching seizure, or assisting a police officer. That role precludes them from being an ordinary dog while they’re out and about. When that harness is on, the dog is not a cute little puppy you run up to—it is another living being, hard at work and deserving of your respect. Even more importantly, the dog is attached to someone who is depending on them, and that person is also deserving of your respect.

To those who pet the service dogs: no excuse is good enough. Please, for the sake of safety and common decency, stop.