There are three things I teach learners never to put online:
1. their name
2. their photo
3. their location
We, in parentis loci, should not be doing these either. Learners in my rooms choose and use screen names and avatars. We will say the city and town and country of our school for collaborations but not our street address.
Alec Couros' recent post http://educationaltechnology.ca/couros/1203 puts this reason in perspective.