Ask them if this includes kitchen knives, ball-peen hammers, and automobiles, all of which can be used as weapons. In fact, more people are killed annually in hit-and-runs in the US than with firearms, by about 6 times (someone fact-check me here please). Advise them that if they want to make the complex safe, cars should certainly not be allowed on the property, including theirs.
This. I don't think landlords read the things they add to lease terms very well. They try to cover all the bases without realizing how many bases they have.
For example, the wording of my current lease prohibits me from having a stove, oven, baseboard heater, water heater and even electric light fixtures in my apartment, despite the fact that all of those things are hard-wired into the apartment and are owned by the landlord. By the letter of the lease, I am required to remove all of them from my apartment (even though doing so would cause thousands of dollars in damage to the apartment) or be subject to eviction. I would also be subject to eviction if I complied with the lease terms for doing that degree of damage to the place. In order to have any of those things within the terms of the lease, I must secure prior written consent from the landlord, and if I lack such consent, in writing, prior to installing or simply possessing the prohibited items, consent will not be granted.
It's utterly insane, but it's right there in writing.