Generally, if you are gagged, or muted for any reason, its warranted.
Now, depending on the type of reason for being mute/gagged, there are differnet penalites.
Being loud mouthed, foul, whatever, I can see mute/gag for a few rounds. However, Annoying binds on the other hand, I dont mind leaving a gag/mute in palce for over a map cycle.
Ask around NS about that.=D.
Another things, is if they rejoin, at ANY time after tha, I Will remute/gag them, since they are avoiding punishment. The fact you rejoined, is not abuse at all if he remutes/gaggs you.

Simple Form.

He mute/gagged you.
You Rejoined to get ungagged/unmuted.
You get remuted/gagged.
I fail to see the abuse.

Im an outsider as well so..
/hide