Technology isn't enough to sustain coalitions, but it is increasingly easier to get them started and keep them going over substantive issues. It's popular in San Diego for the powerful to rail against citizens exercising their rights to challenge the processes that expend public funds. This is not a new phenomenon. That's what democracy is all about. You might even observe that this is why we have democracy instead of dictatorships or other systems where people in power are more simply able to redistribute resources to their cronies without critical public review.
Democracy exists to compel power-brokers to be more honest and inclusive about their dealings.
For every project that faces citizen-based challenges, we can all name others that have moved along by dealing directly and fairly with the challenges. But when people are left out of the process, or their issues are unaddressed, you can be sure that a group can be formed to force the issues. This will be more true than ever in the 21st century. It is the political will of the people that makes and sustains the political will of governments. Whoever and whatever is able to tap into this new form of human energy will transform politics as we know it.