I don't love it. I think grassroots lobbying is free speech.
If you choose to tweet towards your office in Mississauga Centre, that is pretty conspicuously in the public domain. It has its own accountability mechanism by the fact that it is, in fact, in the public domain.
Should people who organize those campaigns have a registration obligation? Absolutely. However, the people who engage in them, I think that's a little bit too close to regulating speech.