This is one of the things I hate about Twitter.

It can be used for disgraceful purposes, such as what a Chicago man did the other day. Fortunately, it cost him his job.

Daniel Grilo went on Twitter to make a disgusting commentary on the widow of a Navy SEAL who (a) had been killed in combat and (b) had been invited to hear Donald Trump’s speech to a joint session of Congress.

The president called attention to Carryn Owens, wife of slain SEAL William “Ryan” Owens. She stood and cried while the audience cheered for her. I guess Grilo didn’t like it. So he posted something utterly distasteful about what he had witnessed on television. He tweeted: “Sorry Owens’ wife, you’re not helping yourself or your husband’s memory by standing there and clapping like an idiot. Trump just used you.”

That’s the bad news. The good news — from my standpoint — is that the financial firm for which he was set to start work dismissed him.

I hate a lot of things about Twitter … although I do use it myself. I have fired off more than 14,600 tweets over the years, but I have sought to avoid the kind of personal insults that we too often read on this social medium.

We all get 140 characters to say whatever it is we want to say. I try to be more discreet than the idiocy fired into cyberspace by the likes of Daniel Grilo.

Grilo did apologize to Mrs. Owens and to the president in subsequent tweets. I’m sorry to inform you, dude, the damage was done and as an old friend once told me, “You cannot unhonk a horn.”