Rail passengers have more reason to despise mobile phone users this week, after Japanese researchers found that the radiation emitted gets trapped inside train carriages, potentially building up to exceed recommended limits. What passenger behaviour enrages you, and what would you have done about it?
It's not just the radiation that bounces all around the carriage, it's the conversations as well. So I'm fortunate that most trains in Germany block mobile phone reception, with special carriages set aside for those who wish to use them.
But the thing you can't avoid are the groups of deaf old dears, off out for a walk in the country. They look quite amusing, dressed up in their plus-fours and red knee-length socks, but then proceed to talk in their yokel accents at the tops of their voices, discussing whether they have caught the right train or whether they should have brought an extra jacket with them - just like school kids on a school trip. And it always seems to be the morning after I've had a few beers the night before and just want a little bit of peace and quiet before all hell breaks loose in the office.
Dewi Evans, project manager, Stuttgart People who put their feet on seats.
I think every train should have a cattle wagon attached at the back, with the offenders hung from the ceiling. Cleaning of the wagon, and removal of the cattle, to be optional.
Or perhaps they should be forced to use Virgin Rail. The same could apply to smokers, with train companies using old rolling stock for smoking carriages and not cleaning these either, saving on cleaning costs and upholstery damage.
Mike Dommett, 45, agent, Belfast Groups of badly supervised schoolchildren, seeing just how much noise and disruptive behaviour they can get away with, while their teachers sit some distance away pretending to ignore them or only occasionally intervening with an ineffective reproach.
Tony O'Donnell, 37, senior project manager, Kent The buskers who wander through Tube carriages, subjecting us to their typically over enthusiastic interpretation of our favourite songs. They must be on to something though, as you always seem to have to grease their palms with silver to make them magically disappear into the next carriage, where they can continue to inflict their aural carnage on more unsuspecting ears. If only there was some form of busker remote, with a rather large mute button.
David Lavin, 29, Tewkesbury I don't travel much by train, but when I have I can't say I've been much inconvenienced by other passengers. Other people making mobile phone calls doesn't bother me, and I have even been known to make the odd call from a train myself.
So my main gripe is not the behaviour of the passengers, but that of the train companies - cancelling trains so that subsequent services become overfull beyond endurance. My solution would be bring back good old British Rail.
Martin Sachs, 50, Highways group leader, East London