Criminals don’t like to be challenged. If a burglar is driving around looking for houses to break into, they’re going to be put-off if they see a bunch of folks in the neighborhood chatting it up.
There’s a strategy you can use here known as positive loitering. The premise is that if you hang out outside with people in the neighborhood, you can keep your eyes peeled and show criminals that they aren’t welcome.
The occasional block party or garage sale are a great way to get to know your neighbors!