It helps the other 29 kids in the class until there are altercations involving 5-7 of those.

Then it helps the other 22 kids in the class. What's the endgame? Do you suspend half the kids in the classroom because they're causing a disturbance for the other half?

Something this whole argument misses is that school is a great mechanism to teach kids to interact with each other and learn to solve problems.

It's a bad idea to teach kids that everything is always black and white.