In the other side, you can end up with someone who has psychological issues. The person you are about to "bang" a person that only for that night would develop an attachment to you just like. Don't you believe it? Last year almost 13k cases of sexual harassment were reported (according to Equal Employment Opportunity Commission of the U.S.A.). Even through U.S.A. is a big country, you could run out of luck sleeping with an insane person. You don't know if you will get away of that.
Even if you don't remember what was her/his name, a one-night stand can imply risks or advantages that now you know. Keep in mind that this experience must be your decision, and don't feel guilty, is common than everybody thinks. Is also important be always prevented because infection and illness statistics are alarming, no one is out of danger. Wherever you go, try to choose good people to have a good time. After all, life is for enjoy and have fun but rationally, with caution.