Regretsy for using a button with implications they didn't realise. I think that's a little bit of a stretch, along the lines of "Facebook users complaining of

Regretsy for using a button with implications they didn't realise. I think that's a little bit of a stretch, along the lines of "Facebook users complaining of privacy violations are at fault for using a service whose implications they didn't realize" - I mean it's true, in both cases, but assigning equal levels of fault is a little bit much.