[yesenadam]

> on Twitter, the only way to express disapproval is to "join the conversation"

I've never signed up for Twitter, so not an expert, but doesn't unfollowing someone express disapproval?

[GauntletWizard]

Unfollowing someone is the best way to get their tweets in your timeline with the current state of Twitters algorithm. You were interested enough to follow and mad enough to unfollow == engagement.