When you are playing a match or deathmatch, first garrison all your units and send out your miners ONLY! Then build up your army inside. Once or twice your enemy will attack you, laughing that you have such a helpless defense.Then suddenly BOOM! Your army will conquer and the opponent will get confused. They won't be able to raise an army quickly and will LOSE!!!!MUHAHAHAHA!!!!:D

good
now explain in the details the units used, the strategy to not let him understand your aim, ecc.
then I'll probably become interested at this

There's a thing called scouting your garrison. If they're smart enough to come harass your miners, there's every chance they're moving in to try snipe as many miners as possible. If they move in (which any mid-high level player *WILL* do) then they scout it. 99% of the time they will react. Either way, there'll be making an army at the same time as yours, only you're not attacking OR defending. So there's no actual point.

This is psychology, not strategy. And at best, it is really stupid.

You're also stupid.