Parking Lot Observations

I drive to work and park in a lot across the street. Yesterday as I walked the 200-300 yards or so my place of employment I noted the following items on the ground (i) a dead rat -squashed flat (ii) a used condom (iii) a used syringe (no needle). Previously I've come across a 9mm cartridge* case. Two years ago there was the brick incident and all this is just five blocks south of Seattle's famous Pioneer Square. I'm re-considering my parking options...

* As an explanatory note for gun-free Brits who may not be familiar with such descriptions, this is the expended case of a fired bullet.