But the guy tapped that meant it was ok.
To me there are only 2 types of jerk moves.
1.- A move that doesnt actually accomplishes anything but annoy the opponen, like if i have reverse kesa and you trapped my head with your legs and just squeeze, you know that without an arm inside and in that position you will only apply pressure and some friction (if gi) to the head, it doesnt taps anyone.
2.- A move that its clearly illegal in the context of the match, for example going for a heel hook in a BJJ gym or going for a toe holds or kneebars against whites or blues without making an agreement.
Number 2 is a major beef of mine, a lot of veteran purples and browns just think that because they are not allowed to use leglocks in competition, they can do them freely against blues and whites that have never seen them. Leglocks arent allowed in brown because you know how to use them, but because you are in a position to understand and asses the danger of receiving them. A white belt on a toe hold, will only tap until there is pain, and by then its already too damn late.