if you can't face of consequences of your comments, NEVER post them online. pics, comments never go away , might not hurt you tomorrow but one day will come back to haunt you.
also, it might be a wise idea to restrict your facebook settings, only close friends should be able to read your status, view wall posts ect.
this is why i don't friend people from work (plus don't know them that well) and un-tag all pictures that would be comprising, ie, when im wasted
im studying an IT based course, just covered a subject that included problems like this.