I must admit I never have a radio when I'm spectating, I just find somewhere to sit/stand and watch. I must say as well, while I watch the sidecars, they don't float my boat as I'm into bikes as most of the people there are so it's no surprise some people start to disappear. My next door neighbour also goes religiously with his mate, have been going together for over 20 years and while my neighbour is bike mad and a marshal, his mate on the other hand despite being a keen biker couldn't give a hoot about the racing and doesn't go anywhere near the track when the racing's on(his exact words "why would I want to watch that rubbish?") and instead goes somewhere quiet for the day. Some people do actually go just for a holiday.