Hacked
Hacked is a subtle, but potentially deadly spell: when cast on a person, it makes him think that he’s deleted a comment on social media without posting it, when in reality he’s just hit Enter. The spell also alters the victim’s short-term memory so that he does not actually remember writing the comment in the first place. If the victim is not currently posting on social media when Hacked is cast, the spell stays in place for eight hours, then dissipates.
This spell is generally considered to be both a form of mind control, and a provocation. Hacked doesn’t work on people who never write, then delete without posting, unfortunate comments; and it has no real effect on open and cheerfully-obnoxious trolls. But it’s a great bit of malicious social thaumaturgy to use on people who are trying to keep their temper. The drawback to that is getting a name for using this spell more or less guarantees that various people will start gunning for you, mystically speaking. Mundane trolls are bad enough.