Re: Missing the point
"I remember carnivals where the whole estate would get together to watch, and there wasn't as big as a worry of crime"
Perception is not reality.
Statistically we are safer than we've ever been at any point in history, even with recent minor rises in crime figures.
That makes any form of crime newsworthy which in turn means that people think crime levels are higher. They're not, they're just better reported.
I lived in the countryside as a kid in some very isolated areas. The reason we didn't bother locking doors was that anyone wanting to break in would do so anyway and as well as a turned-over house you'd also have a smashed doorframe or windows. If the place wasn't locked they usually didn't bother making a mess and just went for cash or easily sellable items.