stickers / decals / signs all may or may not help , draw attention, invite theft / show pride.
Maybe layers of security are as or more important.
Here are a few layers and I realize that some cannot procure all and some may not be able to based on type of dwelling or living situation.
But layers = time and warning to some degree which can save your life and also, a BG will notice where layers are present vs. where they are not.
Layers...
watch dog / alert dog / or even small yappy dog that goes nuts when senses presence near entry point. For $100 bucks you can buy a device that is motion/sound activated that you set near the door and it "barks" when detection is made. My sister has on in her kitchen by the back door. It's pretty cool.
Outside lights. Motion are great, but even porch and flood lights are good to leave on.
Solid doors with good solid frames / dead bolt locks. kept locked.
Security system kept on for outer doors and especially when sleeping
Good powerful hand held spot light and flashlight. I once noticed a stranger poking around my SUV. I spotlighted him and he took off like a track star.
lights on timers that periodically come on during the night. doesn't have to light up the whole house, but if someone is casing your place for info, if they see the kitchen light up at 2am one night but the den light up at 330 the next night, that is a good thing.
most security systems have a key fob panic button option. nice to have in an emergency.
have a plan for where to seek safety, phone for calling out, and yes SD / firearm plan to protect and save life.