Whom do you trust on the internet to keep you safe?

Trust no one, that’s what I always say, given that one tech company after another fails at protecting us: by taking advantage of our data, abrogating responsibility for the vile hate that courses over its platform, and finally by endless publicly agonizing over what to do about the mess it has created.

After the past weekend’s tragic mass shootings, the high stakes got even higher, especially because one of the sick gunmen had become enamored, like many white nationalists, with the cesspool that is the 8chan social network, using it to post his bilious manifesto ahead of his nefarious acts of violence.

[Kara Swisher answered your questions on Twitter.]

“Cesspool of hate” is, in fact, the phrase that the Cloudflare chief executive Matthew Prince used in a blog post about finally deciding to stop providing his security company’s services to 8chan, noting, “Enough is enough.”

Memo to Mr. Prince: Enough was enough a very, very long time ago, and being dragged kicking and screaming into taking a stand and admitting that there are real-world implications of the online tools you have built is not brave in any way. Welcome to the conversation, raging for a while now, about the responsibility of tech companies to control their inventions.