Currently there aren’t any mods that blacklist acid ants but it should be relatively easy to make one. You can either make a mod yourself for it or follow my sloppy instructions on how to modify the no acid zombies mod to do so.
Open cataclysm\data\mods\No_Acid_Zombies\modinfo.json with a text editor (preferably Notepad++) and add the following to the monster blacklist inbetween the square brackets:
"mon_ant_acid", "mon_ant_acid_larva", "mon_ant_acid_queen", "mon_ant_acid_soldier"
You should end up with this:
{
"type": "MONSTER_BLACKLIST",
"monsters": [ "mon_zombie_spitter", "mon_zombie_corrosive", "mon_zombie_acidic", "mon_ant_acid", "mon_ant_acid_larva", "mon_ant_acid_queen", "mon_ant_acid_soldier" ]
},
And add the following text at the end of the mod file:
{
"type": "overmap_special",
"id": "Acid Anthill",
"copy-from": "Acid Anthill",
"locations": [],
"occurrences": [0, 0]
}
Finally, make sure there is a comma after each entry except the last one. If you do everything properly acid ants should end up banned from the game along with their anthill.