There's an infinite space of solutions to your particular problem, but your chosen solution is totalitarian surveillance in the workplace because an intern got offended?
I avoid workplaces which force shit like this. So do all the good developers I know, because they're people who can afford to be choosy.
Bullies are pretty adept at functioning in these environments. Instead of harassing on monitored DMs, they'll make verbal comments with double meanings, use their leverage to put their targets in unpleasant situations, undercut their targets at meetings etc. Totalitarian surveillance doesn't stop bullies. It just makes your workplace a soul-destroying shithole for the employees who are forced to work in it.
I avoid workplaces which force shit like this. So do all the good developers I know, because they're people who can afford to be choosy.
Bullies are pretty adept at functioning in these environments. Instead of harassing on monitored DMs, they'll make verbal comments with double meanings, use their leverage to put their targets in unpleasant situations, undercut their targets at meetings etc. Totalitarian surveillance doesn't stop bullies. It just makes your workplace a soul-destroying shithole for the employees who are forced to work in it.