twofish-quant said:
I really don't know of anyone that uses endorsers. The people that I know that use arXiv do it because they themselves want to do the filtering of articles.
Note that he's talking about the endorsement system that was implemented a few years ago whereby when a random person uploads a paper to a particular section for the first time, they may need to have someone (who has already authored a certain number of papers in that section) verify that it is "appropriate for the subject area", before it is allowed to be posted in that section.
See
http://arxiv.org/help/endorsement
Endorsers are not really supposed to judge the quality of the work (it is not peer-review). From the arXiv help:
We don't expect you to read the paper in detail, or verify that the work is correct, but you should check that the paper is appropriate for the subject area. You should not endorse the author if the author is unfamiliar with the basic facts of the field, or if the work is entirely disconnected with current work in the area.
It is, however, possible for someone to lose their ability to endorse for a particular section, and supposedly the people running the site reserve the right to do this "for any reason", so no one can answer the question with 100% certainty:
We reserve the right to suspend a person's ability to endorse for any reason. If you endorse a person who makes an inappropriate submission, we may suspend your ability to make endorsements.
Of course, as far as I know, the worst thing to happen to an "inappropriate submission" is that it is moved to the general Physics section.
This is just what I know from reading about it. I would actually be quite interested to hear from anyone who actually has first-hand experience with the endorsement system. Not everyone has to bother with it (I don't know if they use information from your IP address or e-mail address or how they do it, but I never had to bother with endorsers when I first uploaded papers from a University).
I do also want to emphasize a point that twofish-quant made. A paper that is not written clearly has very little value, even if you can somehow argue that there's good physics buried in there somewhere. I would strongly advise anyone to do whatever they can to make sure a paper is as clear as possible, with as few mistakes as possible -- even if you have to pay someone to edit it to make it clear and readable.