Some measures that mitigate a problem are associated with places where said problem is a frequent occurrence.

If a place has tornado drills and tornado shelters, it's a safe bet that tornados are at least somewhat likely.

Some safety and security measures have the effect of making a place feel unsafe and insecure, for this reason.

> What's wrong about syringe disposal? A significant portion of population has diabetes.

Ask yourself if that's truly what motivated those being installed...

> And even if a drug addict uses it, still better than throwing to the trash

The problem is they still throw their needles all over the ground. As is typical, the intentions are noble, but what ends up happening is people who can't even be bothered to not shoot up their gutter heroin in public are given society's tacit approval to do what they're doing, thus accelerating the societal rot.