It's not the alternators, it's the inherent need of some to prove they are right and that others are wrong. "Can't we all just get along?" and help each other?
I thought that this site was all about that!
For me it is only to provide accurate information. Some of these pre INTERNET urban legends die hard the truth is removing battery cables with the engine running can and will damage electrical and electronic parts. I always tell people read whats on the INTERNET but check it in multiple sources before you take it as fact and even then be careful. Most likely this legend started in the pre alternator days when they still had generators on cars and electrical systems were simple.