Anyone with any sticker is a target - the color means nothing. You should also check to see if there is an "X" painted on the road in front of your mailbox. The "X" will show up on the UV camera of the drones. The only way to get rid of it is to cover it with something opaque to UV.
By the way, those stickers on your mailbox were probably put there by your paperboy. One color means you get the daily paper, another color means you get the weekend paper only, and the third color means you get daily and weekend editions.
If any of you see stickers on your street but not on your box, add one and see if you start getting the paper.
Yep! the "spring assist makes that a dangerous weapon in Seattle, WA. The fact that it is over 6" long when open puts it firmly in that same category of dangerous weapon. Right up there with "any fixed bladed knife, sword..." like your butter knife.