If I were you, I would get an EIN. It is safer than using your ss # and it's easy to get. go to www.irs.gov
and search it. You can do it online.
Also, even if you are a LLC you can still be personally sued. So don't think that just because you are not a sole proprietor that you won't be held personally liable because the person suing can sue you as a person and the company.
I'm a sole proprietor and have had no problems. As long as you have insurance and be carefull then you should be ok.