when you see a vindicator nearby about to shoot and you dont have any AT (anti vehicle) weapons, simply run up to the vehicle and stand in front of the barrel, the shot will hit you instead of the gate, often exploding the vindicator in the process as the explosion is 2 inches from it. I have done this multiple times.
This should be a Youf inishiashun ritchual. "Oi new git, go stan' in front ov dat der kannon. All da 'Ard boyz are doin' it."
I witnessed dat git doin dat fingy bout da kanon. can confirm it workz gud, and its very right, propa, n orky.