There may be more of us than there are of them, however they have a significant larger amount of tools and resources at their disposal than we do. Likewise their 'forces' are significantly more reliable than we are (myself included). After all, we are a bunch of horticulturalists, that for some odd reason get frequent bursts of uncontrolable 'munchies', couch lock, and an odd sense of paranoia that seems to stay with us during certain periods of our life.
Big brother has several 'cousins' working 40+ hours a week a peice, 24/7/365. Most of us are not willing to spend that amoung of time trying to overgrow big bro.
That being said, it's a worthwhile idea, but being that it takes several months for a plant to go from a seed to a plant in order to create new seeds, when it only takes an officer two seconds to pull it out of the ground. The odds are against us.
Even still, I'd be willing to give it a shot