I haven't had any problems with using it for anything, neither has anyone I know that uses it.
How could it be dangerous? You email, or you call, and you get a company name, you get human resource's names, you get a website, you do some research. I'm not looking for a job as a prostitute and planning to meet the person in a shady motel
. It's pretty easy to tell what is a company and what is a trash ad.
I wouldn't post my resume on craigslist, but craigslist is a great place for job listings.
It's about as dangerous as posting on this horse forum is.