Facebook has this so called foursquare and check in application where it tells people where you are exactly at what time and with who. I know many friends who use this application and no doubt it's interesting to read/know, I myself have/will never use it.
I have one particular female friend who is the very frequent user of this foursquare, I can see her update her whereabout everyday (which means I know her house and her working place), as well as places I think she uses to be at everyday.
Well, I personally think that this application brings certain risks. It's not good and not safe to let people know where you are at that point of time. I mean of course the application serves certain functions but I think it has more cons than pros. Same goes to Twitter updates. Who knows someone is following you? What do you think?
Friends, be careful with what technologies can do these days and use it wisely.