two good shots in the butt of the tank would still kill it... besides.. i think the pads are far enought from the flag that they are out of range.. right?
What's really great if you take a map like Gazala, boobietrap a repair pad with exp packs then leave. I've done this by taking a flag (landing with a plane there) jumping out, taking the flag and droping exp packs) then flying out again. When the flag goes grey (which inevitably does shortly thereafter, just push the plunger. They have no idea what hit them especially since they know your on the other side of the world.
Works also on maps like guadal where you leave a perfectly innocent vacent tank behind for someone to jump into when they take that flag on the hill (exp packs under or tucked behind tank). Great fun to be running across the plain to another flag and push the plunger and see it in the way way distance.