It's true that people tend to be more aggressive about deleting pages about people and companies than they are about deleting random Star Trek crap, but it kinda makes sense. Most of the truly rubbish pages which show up on wikipedia are random schmoes creating their own wikipedia pages to promote themselves, their businesses, their bands or their blogs, so the notability criteria for people, businesses, bands and blogs are pretty firmly enforced. At least there's only a finite supply of random Star Trek crap to be incorporated.

Ironic, perhaps, but not at all surprising. Wikipedia is a portrait of wikipedians.