Why would the presence of "rubbish" make it difficult to take other work on the site seriously? It is just an e-print archive, not an editted journal.
The same situation exists on arXiv.org and there are plenty of controversial papers there. In fact since arXiv.org is moderated it should be more of a concern that crazy articles can appear there.
Try these for example
Does God So Love the Multiverse? http://arxiv.org/abs/0801.0246
Test of Influence from Future in Large Hadron Collider; A Proposal http://arxiv.org/abs/0802.2991
