A porn union, while it presents endless opportunities for insanity on-set (downing of tools etc.) just isn't workable, for all the reasons Fuckwhore suggests. And those disregard some of the basic problems like egos, rivalries, and the potential for score settling.

For every mature porner you meet, there are another 10 with more baggage than Delta. Having said that, creating a porn star benevolent fund for people in Nikki's situation would be possible.