Request:
Upon pressing Alt+Tab in game (for task switching), the game should automatically show the Main Menu. (This is already done in several modern games to good effect.)

Reason:
Then upon switching back to the game using a mouse click, it will not fire your weapon or shoot the person who might be in front of you, especially when huddled around an ammo box at the start of a game. It happens so often.

It's also a cleaner way to switch back to the game.