One thing that's lacking from Drew's main point is not asserting why "cracking edgy jokes" or making edgy political statements is useless to an open source community.

Or rather there's no other point other than "please stop being mean", while good, it doesn't merit more than a virtue, in contrast to 4chan style people, they will make make terrible arguments/justifications for being edgy.

The only way to succeed in stamping out toxicity is to have as many strong points about why it shouldn't be tolerated.