Your asthmatic neighbor might actually be helped by the marijuana smoke. Marijuana used to be sold as an over-the-counter asthma medicine. I've seen pictures of what looked like the sort of tin that cocoa used to come in, labeled "Asthmador". I know after my first exposure, at a Pink Floyd concert back in the '70s (the place looked like a fog bank had moved in!), the next morning I was breathing easier than I had for years.