ArXiv includes quite a lot of unreviewed papers. Unless people are actually looking more deeply into the state of a particular paper, you can't assume that it's

ArXiv includes quite a lot of unreviewed papers. Unless people are actually looking more deeply into the state of a particular paper, you can't assume that it's correct or meaningful. ArXiv is not a bad service at all, but I think a lot of people think that everything there is more reliable than it actually is.