Exactly why I don't advertise what I have knives, guns, stereo equipment, no bumper stickers other than a watch 4 motorcycles window decal. If you feel compelled to display stickers/decals put them on the inside of the case, lift up the lid to my tool box and its covered with old stp stickers, cranes cams and what not but outside it was clean.
The days thieves like the best are the Christmas holidays, people get all kinds of brand new expensive toys/tools, computers and all kinds of easily moved items.
Then they throw all the boxes in the garbage basically giving any their an instant inventory of their new toys. Agreed your garbage, break down your boxes do thieves don't know what you have, better yet don't put all of you boxes out at one time or even during the Christmas holiday, wait a few weeks and send it out in dribs and drabs.
Thieves love the holidays, people are always going somewhere to visit someone always leaving homes in protected, make friends with your neighbors they're the first line of defense when your not home,
I had a neighbor who was very nosey, when I worked midnight shift, my brother was living with me while my mother was getting the salvage/junkyard together and he would come home with whatever car came into the yard with gas in it. He drove a different car ever day by the end of the first week the old lady next door told me how she didn't want to interfere but while I was working hard at night my wife/gf was entertaining a different man every night and how he would leave at 5 am eventing before I got home, (my brother had to drive to NEPA from south central Jersey to get to mom's yard everyday).

At least I knew every car that was coming over the house, she always knew when someone didn't belong there.
Displaying your collection is great but it also makes stealing your goodies easier, they're already prepackaged, thieves don't care about original boxes and paper work they're gonna sell your precious knives for pennies on the dollar.
Get a dog, that might not stop them but it will change most of their minds and definitely slow most thieves down.
My last thought on the sticker subject, so long as your not selling them, print them out yourself, most printers today have the ability to scan an example and print it on an adhesive backed vinyl sheet and make your own.
Sorry for rambling and kinda going off topic, when it comes to thieves nothing drives me crazier than people who make a thieves job easier.