Report them.
ZOS whilst never making a massive response to this, have in the past warned/banned people for doing things against the spirit of the game.
So, I am sitting in stealth as a DC group of 4 met up with one of my faction (AD). I didn't attack because it looked like a watch-worthy duel was going to begin. It turned out the AD was a buddy of theirs and stood next to me to 'mark' me so they could attack me, then chased me for almost 5 minutes around Cyrodiil. I couldn't get away from this group as the treacherous AD kept running to me to give away my every location. Twice I fell victim to this strategy followed with T-bags. I don't think he wanted me to mention any names because I guess the guy running this scheme is the gm of a 'mighty' DUELING guild, but I would like to know if there is a way to stop or hide from faction saboteurs to counter this exploit?
Don't watch duels in stealth it gives ppl the wrong impression. Also put your weapon away.
My thanks to everyone for sharing ideas on how to counter this exploit... it looks like ESO would have to re-arrange some mechanics to really put an end to such.
Yoyuyi!? Oh this just keeps getting richer... it was you who ganked a lone spectator with your entourage and the help of a treacherous AD? It was Yoyuyi who chased a lone spectating NB for almost 5 minutes through Eastern Cyro with a group of 5 using the exploits of a traitor?? I guess I was wrong to think such methods were beneath you : / AND T-BAGGING?? Dude... you just went from respectable to rude in 1 post; I would've stayed quiet.
Coming from other MMO's I think ESO has a good gaming community; but going savage like that in the name of 'Pvping' will eventually deteriorate the honor system that Cyrodiil's dueling organizations depends on. My advice to Yoyuyi and such culprits: don't rely on faction exploits and try to keep it civil- especially if you depend on the honor of others for dueling events.