"Within the campaign, netroots veterans like Zack Exley are negotiating how to give Sanders’ base the freedom to innovate while still being able to call on them as a kind of volunteer auxiliary.
I’d imagine there’s little the campaign can do to restrain people who don’t actually work for them in a paid or official capacity. And when your candidate’s message is basically that people need to be more involved in the political process, they can’t really complain when that actually happens.