In reply to lasonj:
I'm all for them.
I can spend 10 minutes yelling "SAAAAAAAAFE!!! SAAAAAAAAAAAAAAFE!!! OOFFFF BEEEEEELAAAAAY", or I can say 'ok I'm safe, take me off belay' into a walkie talkie. The latter lets me enjoy the crag environment in a peaceful manner, the former makes my throat hurt.
Yep, having epics where you're taken off belay accidentally during the crux move, your ropes jam, you both spend half an hour freezing your nuts off because she thought you were still setting up the belay and you thought she was taking the belay down, you get benighted due to said 'adventures' is all good clean fun, but like dropping half the rack from the third pitch, or getting your ropes stuck because you haven't extended your gear - I like to think I make those mistakes once so I know not to do them again.
minimised faff = more efficient climbing = climbing harder = having a whole new set of terrifying epics
You climb with dynamic ropes and belay plates don't you? Taking the 'adventure' aspect to its logical conclusion, you should by rights be on hemp lines, waist tie-ins and hip belays. Much more stressful and exciting
I might be with you on certain adventure aspects, but the way I see it, planning ahead for what will happen when not being able to hear your partner is forseeable, (be it a system of tugs, clicks and whistles or a walkie talkie) is just minimising faff rather than sanitising the experience.
FYI if you have a walkie-talkie where you need to push a button to talk (which is the only thing practical with wind and sea noise IME) then pretty much the only time you use it is at the belay anyway. (none of this 'placing number 2 rock now' business)