Well, it's funny, because I had another good 'nade cookin' experience. The RPG was pickin' people off from the bridge on Sinjar, and I had made it past the crackhouse to the trucks under the bridge, covering while some guys capped B. I looked up, and the RPG was loading, but he didn't see me, so I thought I'd nade him, seeing as I couldn't hit him with the shotty from there. I threw the nade, cooked, unfortunately straight up, and it began coming back down, but it exploded right in front of him, and his gun and body fell down to me.
So, naturally I took the RPG and started using it, it's pretty fun!
Taking out RPG's is relatively easy, because I don't think they have side arms. You just need to wait for them to run out of ammo, or reload, and nade 'em. They'll suicide if you're at close range, they're willing to do it with their high respawn #'s. Guns don't always work, but if the opportunity arises, they die just like everyone else.