Maybe this is too much to ask.
I *really* hate it when two teams have played a long, serious game on a base-ff server, and a human new to the game (or unaware that ff is on) drops a grenade in the base. The worst part is seeing it happen, and not being able to stop it.
So, enough whining, heres my lame idea:
If a human with a good understanding of the game saw a grenade dropped in the humane base, they could walk on top of it, crouch, and sacrifice themselves to minimalize the damage caused by the grenade. Maybe the 'nade would kill the human, but do just half the damage it normally would, and with half the blast range.