Just remember your network key.
"Oh, wait a second dude, they've got the sticker."
"Damn, bro! Another one?"
Let me just unlock the gate, I'll be there in 2 hours after I figure out which key goes where. ~NSHA
From the submitter:
It's actually a clever theft deterrent - it shows thieves you have nothing worth stealing.
Mufflers are making a killing on the black market right now.
~Not-"Not-So-Handy Andy" Jack
It's also the only way to get air inside. Bullet-proof glass is intense.