Just seen this on Facebook.
Another voice of reason amongst the sea of jerk reactions:
http://formerf1doc.wordpress.com/2014/10/07/2271/
That's a really good article from someone who seems to know what they're talking about.
Yup, I hope more people read that 
I’ve been saying since 2010 that flag discipline is deteriorating, and it’s deteriorating fast. And no one is making properly vigorous efforts to re-establish it.
At every F1 drivers briefing, the drivers hound Charlie for a number – “how fast can i go under yellows?” or “how fast under double yellows?”. Or even, “will I be penalised if I do 0.2 sec less than the last time thru that sector…”
I bet that the “appropriate” speed through T6-7 Sunday was probably something like 80-100 km/h – something like pit lane speed. Had drivers done that, the absurdity would have rapidly become apparent, and race control would have had little choice but to deploy the SC.
Before we start changing everything, wrapping JCB’s in tech pro, putting SC’s out every time someone’s in the armco, let’s correctly apply the spectacularly effective safety system already in place. And let’s start by making sure drivers actually respect the SPIRIT (“be prepared to stop”) and not the LETTER (“how many tenths down do I have to be to not get a stop-go penalty?”) of the safety regulations.
Decent article but I don't believe flag rules would ever be effective unless it's supported with a clear speed limit from even to event.
The level of speed carried under double waved yellows will always differ from driver to driver. You also have to consider state of tyres, brakes, track conditon ets. Here in the UK, it's something that works quite well on our motorways when variable speed limits are implemented via gantries when there are traffic issues like accidents, obstructions etc. So if normal road drivers are given this prescriptive speed limit, why not F1 drivers. The pitlane speed limit says it all. Imagine having no speed limit and waving double yellows on entry?
The driver will always try and gain in any scenario. I'm not saying they shouldn't be held accountable for not showing sufficient caution but they are fighting against an inherent trait which tells them they must avoid losing time regardless of the circumstances. So a miscalculation of how fast he should be driving coupled with an increasingly wet track, distractions, state of tyres etc and you have the scenario Bianchi ended up in.