There's a right way and wrong way to honk
On ALC we'd encounter lots of suportive drivers (and only 1 or 2 idiots) and you can tell the difference. Encouraging honking is a light tap on the horn, like "beep beep beep beep beep beep" :)
If they are yelling riders can't hear what they say but the "cheerful style beep" we know.
That's as opposed to laying on the horn right behind or anywhere near a rider. We all know and hate that. :mad: Even in a large group, century or charity ride you can't assume that sudden noise is not going to freak someone out.
Decorating your car with "Go MS 150 riders" or posting a sign is alright too.