Pro cyclists are like a set of pawns played out by a directeur sportif 200 metres behind watching the tv, listening to race radio while the mechanic in the back snoops on Lance's tweets from halfway up the Tourmalet. OK that's an extreme view, but the riders should be left to make more tactical decisions both individually and as a team whilst on the road. They're too reliant on receiving the orders of their respective cars.
Stages like today's would have been far better without the radios as the teams would have greater dificulty in keeping track of who'd made the jump. The team leader used to be exactly that – marshalling the troops around them and adapting their gameplan as necesarry. Now the "team leader" is a figurehead role and little else.
As for the safety arguement, give everyone a 2 way radio – to the race Director / their entourage. They can be warned of impending danger and riders can relay problems (like riders disappearing off the road) to the people that can do something immediately.
Exciting racing wasn't an issue before the introduction of race radio. Plenty of incredible racing then, and far more (succesful) attacking racing because of it.
I'd love them to ban radios from the team cars on a permanent basis.