No, they gave the cannibal ants a link to a new food source. Imagine you're living in your house, your neighborhood, and there's this large pit in the center, where the cannibals live. They're 30ft down so they can't get out, so you don't have to worry. Then someone puts a ladder down to them. Start of a horror movie if you ask me.

This comment is full of interesting questions! Would they return to being normal ants due to the environment shift? If they are now truly just "cannibal ants" and not regular ants acting in an opportunistic cannibal manner, would they even bother going to the colony, or would they just kinda zombie around eating other ants? And do these new ant types need to function together in this new style?

actually there was a chinese serial killer that used a technique like this. He had a septic tank and threw his victims in along with the dead bodies of his previous victims and would only let them out if they brought more victims from a train station. article is partially paywalled but is the case in question. https://archive.is/QxBDr https://medium.com/crimes-by-mr-o/this-teacher-was-thrown-in...