Google Latitude, if you haven't heard, lets you have your location monitored and shared in real-time with your friends, family, or whomever you choose. Once you sign up, GPS satellites and cell towers watch your whereabouts. They pull location data from your laptop or smartphone, then pinpoint you on a pretty little Google Map as you go about your day.

While Google Latitude , it may be the first with the potential for mainstream and widespread adoption. Here are three reasons why I won't be hopping on the bandwagon.

1. It's just a little too friendly.

Call me old-fashioned, but I don't want every aspect of my life to be public domain -- even when it comes to my close friends and family. I may be in the minority within the open book, share-it-all sentiment of the Web 2.0 world, but there's something nice about not having everyone knowing what I'm doing every minute of my day. If I run out for a quick cup of coffee, I may not want my buddy to see that I'm right around the corner from his house. If I tell someone I can't make it to dinner because I'm visiting a friend in the hospital, I don't want him to know that I'm really sitting at home eating biscuits.

The same goes for significant others -- do you want your honey having a honing device on you 24/7? (Not that you'd be doing anything you don't want her to know about, of course.)