I've never ran into six randoms doing this. If you're going up against an organized team of 4-6 players, odds are you'll lose anyway. As most people probably pvp solo or with a buddy or 2.
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Correct, but going up against a well organised team is different to going up against an impenetrable wall that constantly regens supers. One is difficult to defeat, the other is impossible. Personally I think it's an exploit.