I think collecting those was a bit of a thing in the 60s and 70s, I’ve run across multiple older folks who did. Pretty sure it eventually crossed with the “turn random shit into lamps” fad in the 70s because that seems to have become a fairly popular thing to do with them.
I mean, I was in high school when the cell phones were largely flip phones and that one nokia brick that could probably survive being run over by a tank and at that point the rule was “nobody gives a shit if it’s in your pocket/in your bag and on silent, but if I see it or if it’s making loud disruptive noises from wherever you’ve got it it’s going in my desk until the bell rings”. That still seems a reasonable middle ground in my opinion. That way, it’s still accessible enough in the event of an actual emergency but not usable otherwise.