I do everything imaginable to avoid dealing with the US postal service. I've had to deal with their horrible user-hostile vending machines built by the lowest contract bidder one too many times. I too recall trying to vandalize one, but that the damn thing felt like it was bomb-proof. I wasn't even able to get any alarm to sound despite my pounding and kicking.

Just get yourself a fedex account number. It's a wonderful thing. When you have to ship something you can just write a number down on a shipping form and stick it on a box of any size, and drop it in a fedex drop box. It saves you quite a bit from paying cash or using a credit card for fedex shipping. Anyway not to sound like a commercial...

I can totally understand why postal employees go postal. I think the design of the postal vending machines reflects quite well the USPS management as a whole.

-Zig