I agree that its worth it. Getting them delivered to my house does kinda worry me. I've had the same mailman since like before I was born though, and I trust him.
Usually not the mail delivery people. However, if it doesn't fit all the way in, they have a bad habit of letting the name stick out. If you live in an area where that is visible from the sidewalk or street, EVERYONE sees that. Then naturally people tell people that tell people. Even an hoest mail person may have mentioned how many and who gets coin, gun, knive, etc type magazines. I know for real there are people that go around checking your mail. One group was recently caught following a UPS truck and as fast as he dropped something off, they picked it up if no one appeared at home. I agree about the blank or black, no titile cover. Then I would order those. But around here in Chicago it's not a good idea to let anyone know anything about a hobby with coins. Two home robberies on my block in the last few years already.
I have a huge mailbox. It always fits all the way in. And I'm in a rural area, theres not much traffic on the road, and if someone is going through my mailbox, someone will probably notcie and call the sheriff. Still, you can never be too carefull.
here is a nice comparision of the coin magazines http://www.mountainviewcoins.com/coin-collecting-magazine-subscriptions.php