stalkers
the fact is, it’s much too easy for stalkers to get aholt of serious information about you on the web to really stalk you in real time and space
if you have a first name, a profession or college attended, and a municipality of residence, within 15 minutes you can be looking at a picture of the person’s house, not to mention know their age and the last five places they lived
if you have a last name as well, it can be done in less than five minutes
that’s why i advise anybody posting anything on the web to think twice and then again before posting anything that could help anybody find out who they are - and imho you should never, ever, use your real name on a public social network site