Actually when I'm travelling on Eurostar (between London and Paris) I have a nifty little device called a "White Noise Generator" which ensures passable Mobile Phone immunity for that trip in my carriage -- people then actually have to DO something when the phone's aren't working.
You can then finally get to TALK to some of your fellow passengers and its often quite enjoyable especially when there is FREE BOOZE onboard as well.
I really HATE it when the guy sitting next to you screams away meaningless drivel on his mobile and can't be bothered to move away say into the corridor -- TOTAL LACK OF CONSIDERATION FOR OTHERS -- so I say to xxll with it and isolate the whole carriage with my little device which a first year physics student could construct for around 5 GBP.
If you are on the Eurostar and your phone doesn't work (outside the Channel Tunnel of course) then you know SOMEONE's on board
Texting is fine for some purposes but people seem to spend HOURS with it at a time --that's the danger I'm on about.
Now if only I could find a way of silencing the noise that leaks out of those little white bud earphones -- maybe instead of bailing out the Banks everybody should have been given a set of the latest BOSE noise cancelling headphones -- a snip at around 250 GBP a Pair. !!