I remember being surrounded by six wanamingos. I was in the enclave armor. I just kept dropping plasma grenades at my feet, and they eventually died. I thought that was a little silly too.
The funniest part, I think in the entire game, was waiting the whole game to get the kama sutra perk, going back and having sex with that guy's wife, and laying in full armor on the bed afterward with her. I nearly fell out the chair.
Sorry. Not really about ants. Just fond memories.