It has become a common and equally dangerous practice for people to change their messages on answering machines, voice-mail or e-mail letting others know they are out of town and will be away for a while. This severely weakens your security at home.
If a burglar suspects that you may not be home and tries to find out by looking up your number and calling, that message can cause a lot of trouble. Now they know that no one is home and the house is ripe for the picking.
Only tell the people that you trust and feel you need to notify when you are leaving your home for longer than a day. This could include family and neighborhood watch members. Let everyone else assume that you are still home. A great way to do this is call-forwarding.
If your telephone service provider offers this option, you can have any calls made to your home phone forwarded directly to your cellular phone. When you answer it will give the impression that your are at home, even when you are hundreds or thousands of miles away.