This just seems common sense to me. Don't leave it in the laundry room.
I guess the part that makes me most mad is that I used to live in an apartment complex where we all trusted one another to not steal, that I could leave my stuff out and not worry about it for the many years that I lived here, and now these people who moved in are very disrespectful of our property. I think it is between two different families that just moved in, because they have been disrespectful/not following rules of the apartments, and I never had a problem until they moved in.
I come from a small town where we didn't lock our doors on our houses and cars. When I moved to a bigger city, it was a very unnatural thing to learn. It's sad that you can't just trust people.