Hi Paranoid Mandroid,
                  If you feel that the ants are becoming a problem the following was part of a posting by Portway Farm:-
If ants are a big problem put some Semolina on the ground where they are active, the ants will take it to the queen who will eat it, but be unable to digest it and explode. (no queen, no eggs, no ants!!!)
Hope this may be of some help to you. ;D
                            PREMTAL