
"E-Petitions are an important way for the government to get feedback from the populace as to what the desires of the country are. Obviously since the petitions are written by individuals that frequently don't have a full understanding of the situation, it's quite common that they do not adequately cover the situation completely enough to give a good view of the options.
The road charging scheme is a good example of this - there is need to do something about the problems with increasing traffic and congestion, as well as the increased awareness of the costs (economic and ecological) of motoring. Therefore a blanket "don't do <x>" is not actually that helpful, since the alternatives are likely to be as unpopular".
See - it's not difficult to weasel out of it, and that just took me a few seconds to come up with, the spin doctors would do a much better job much more easily. There's also the fact that 1.5 million votes is approximately 2% of the population of the country, and in a democracy surely 2% shouldn't have a controlling vote?
If the UK government actually wanted to do what the general public wanted then there would be a couple of immediate affects. Firstly we'd see an increase in public campaigns by the press (if they can brain wash enough people, they'll get what they want), and secondly the country would go "to the dogs". The general public (myself included) DON'T know all that's going on - so their suggestions are likely to cause more problems than they solve. I've always considered suggesting a "true" democratic party, where the people within their constituency get to say which way to vote in the house (e.g. website, drop in center, etc) and if more than 10% of people express an opinion, it's legally binding. However, that brings home the point that people are stupid - and it would be a recipe for disaster.