For those travellers 'stuck' at the various airports in southern UK as a result of the weather conditions I'm afraid that I really do not have sympathy for them.
They're all moaning about their precious trip to Orlando and the like, about how it's only a little bit of snow - well tell you what, how about you try running along the runway as fast as you can, let's see how easy it is for you to stay on your feet. Now scale up that scenario and try keeping your Boeing 747 in a straight line whilst building up the required speed to get you off the ground.
If there's any doubt about whether it is safe, then I think I would prefer to let the decision be taken by those that have the necessary knowledge to do so rather than those 'lay' people waiting in the terminals.
I'm sorry if this seems a negative perspective, but the simple point is you can 'go on holiday another time' but should your aircraft have problems on take off/landing then you can 'only die once'.
The other point I'd like to make is that things do go wrong with plans, especially travel plans - so simply be prepared. Too many people nowadays are too quick to pass onto others their own simple responsibilities, too quick to blame others - well if you're going on holiday then I expect that you have some disposable income available - so use it. If you're stuck in a terminal due to weather, why is it expected that the airlines (who themselves are stuck) are immediately expected to feed (and almost clothe) the travellers, it's not their fault that the runways are closed. I would also go so far as to say that it's also not the complete responsibility of the airport authorities - we all want 'cheap' transportation, so the airports can't have billions of pounds of equipment laying around just on the chance that it may get a bit snowy.