Your grandparents — and, yes, mine too — were visionaries. They were way ahead of their time.

They warned us, “If you can’t say something nice to someone, then keep it to yourself” … or words to that effect.

They didn’t anticipate the advent of cell phones or the myriad other recording devices that have proliferated our society. But, man, they nailed it!

Just look at the Uber driver who has been caught recording passengers without their knowledge. Then you had the idiot at the Chicago Cubs baseball game who took a ball from a youngster after one of the Cubs players had tossed the ball to the little boy; yes, the ballpark incident was captured by TV, but you get the point.

This all happened over the weekend.

There have been instances of people cussing others out. Road rage incidents are recorded for posterity by motorists who watch them unfold in real time.

I’ve lamented before that the ubiquitous nature of these devices should make us all a lot more reticent when confronted with potential problems.

Everyone, or so it seems, has a camera these days. You say something unkind or crude, it gets recorded. You erupt in a spasm of anger, or possibly, violence — that, too, becomes part of the “public domain.” You mistreat someone, get ready for the “viral” distribution of that action all across the planet.

When will we ever learn? When will we heed the advice given to us years ago by men and women — Grandpa and Grandma — who were way ahead of their time?