Local Facebook groups coupled with everyone having cctv or a ring doorbell. I was happily ignorant that anyone was trying my car door at night or whatever else they're up to. Now you're getting daily updates.
I also get a weekly email off the police with details of crimes committed in the local area, if I didn't get that I wouldn't know most of them had happened.
Similarly twitter and other social media love to highlight things happening across the country you never would have heard about, coupled with a decent number of people who like to push a narrative that we're under attack.