If I got that question by text though I'd normally ignore it until Monday.
Bumming around doing nothing is one of my most valued hobbies.
"are you bored ?" might get a response, but better to reveal something about the proposed alternative. "want to do macrame on Sunday?"

I especially hate this one in work.
"you free?"
Unfortunately, a polite reply is expected in that context so i can't say "no" (I'm at work, as you fucking well know).

The question normally means " i fucked up x and don't know what to do about it"

If they don't tell me what "X" is, how do I know where their fuckup ranks in the wider population of fuckery.