It would not do anything to a tank, but why can't they atleast pretend to be putting up a fight?!

I mean, they are just running there. How realistic is that? I would not risk my life running into a base if I was a troop and did not even have a machinegun to defend myself, I'll even throw in a wish for grenades then, just for your tanks.
I know it will probably never happen, but I just had to throw out the idea..
