Have you ever hearted something, realized it was a bad idea, and unhearted quickly?

yes. i've also hearted unsavory posts accidentally while scrolling through, which i quickly unheart before anyone thinks i'm a creep.

yeah. sometimes I heart things to be nice but realise it might make me look like I'm a supporter of what they're saying

Only when I inadvertently hearted my own comment. At least so far.

Yes. Sometimes the headline lures you in, but when you open the post and see the content, it's like, ewwwww!

It happens

Yes, long-winded ones with points that make sense but with an overall POV I can’t support.