I don't expect to prevent solicitors from coming in and I don't expect the cops to come guns blazing. I do expect to convince them to leave and dissuade them from returning...one at a time...with help from my neighbors.Back when I worked a job that required me to get into gated communities without anyone's permission (most of the time, apartment complexes) I kept a chain in a burlap sack in my trunk. There was a rope that tied the bag closed. I'd throw it over the exit gate, drag the chain over the induction loop that opens the gate for exiting cars, and as soon as the gate started to move, I'd throw the rope over the gate, jump in my car, and drive in through the exit gate. It didn't always work but it usually did.
tl:dr - Tailgating residents isn't the only way for a non-resident to enter your community.