It won't completely stop the production of THC...but yes, it will slow down a bit for the production of seeds. If you want more seeds for next round...leave it. But if you want more potent, seedless buds...chop it.Sounds to me like its a Hermie (both male and female) YES this will WILL polinate all your other girls and stop them producing THC and start them producing Seeds, Remove it ASAP.
If its in early stages of prducing seeds them it probably hasnt shot its pollen off yet so it should be ok, How long they been 12/12?
Made me giggle, nice one I might have to try that.If it's a hermie get rid of it. Spray water on the sacs to contain any pollen then throw a trash bag over that bitch to contain it even more and transport it out of the room and throw it in a church parking lot.