If the posts so far on this thread are anything to go by, any such measure would have to be something built in to the system and out of the individual pilot's hands completely, for it would seem that everyone who thinks it's a good idea has his own ideas on how and when it should and shouldn't be done.
And I suspect the vast majority would continue to do nothing unless it was done for them. This says a lot about the trust most of us put in an ATC system that has been proven in a couple of very high profile cases to be overloaded and sometimes flawed.
What's going to be really interesting is if the findings in the Brazil tragedy (or some future midair tragedy) say the accident could have been avoided if a policy of NOT flying on the airway centreline had been introduced worldwide some years ago - as some professional pilots, like "410", have been calling for here on Pprune from the earliest days of the site. (I can remember reading "Lessons from Delhi", [that called for offsetting], on the PPrune Home Page many years ago now, Danny, if available bandwidth allows it, maybe you could consider putting that back on the Home Page where people can read it.)