I have sabotaged in the past. Generally, it's when I want to play and usually not with a beginner lead because it can freak them out. Very, occasionally, it's when I think the leader is behaving like Hitler, I'm bored with three gazillion pretzel turny things, I may as well be a lampost for all the human interraction ... then my sabotaging is the dance version of throwing my toys out of the pram. How you tell that as a leader is to perhaps think back over how much of a connection there seems to be between you and your partner - if it's good - and your lead is more like an invitation, then sabotage is just me asking for playtime.
The solution, IMV, is that early on with a new partner you find out if they like playing, so allow them a little room to play in a move or two and see if you get playfulness or a glare. If you adapt your lead accordingly, this eliminates you having to guess whether sabotage is come from a good, musical place or is just revenge.
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