Black widows are not aggressive. They are one of the few spiders I will kill because they could take out my cats, but in reality, I have them crawl on me several times - no bites. Mostly, if they see you seeing them they are like “RUN!” and take off. My house and garage used to be infested with them.
Ya. Probably a lost cause. Plus, they kill insects.
They are too close to family. Me? I can deal with it but if my son or wife get bit, that is not good.
I keep them out of walking path areas. I don’t hunt them behind boxes although they are probably hiding out there too.