Some of it would remain and protrude and have to be sanded down to avoid injuries, then possibly painted or otherwise treated to prevent rust. The only viable solution to this problem is ensuring that the right kind of benches are installed in the first place.
I would also recommend bringing along a classic adjustable wrench and/or a pair of pliers
Those look like they are welded
So what I’m hearing is someone needs to go around with a battery powered angle grinder and just buzz those right off, as a public service.
Be the change you want to see in the world.
Some of it would remain and protrude and have to be sanded down to avoid injuries, then possibly painted or otherwise treated to prevent rust. The only viable solution to this problem is ensuring that the right kind of benches are installed in the first place.