Bullets fly through everything. Troops can run through hedgerows that stop tanks.
All that sucks.
As far as the ack goes though. Simply run down there and draw fire. It's not hard.
War is hell, if those poor bastages want to die for their country, I say GOOD!
Edit: Let me clarify here.
So, what is happening is that you see the white flag and drop troops without checking for ack?
How many times has this happened to you guys?
Think about this: You've smashed the town good and still no white flag. You then have to fly down there and draw fire to see where that ack is. What's the difference?
It only takes 50% to take a base. Is it so much to ask that you check carefully for any AA guns that might be up before dropping troops?