Using any pesticide is grim, IMO. We're putting enough poison into the environment as a side-effect of day-to-day life, and the last thing it needs is people deliberately adding more.
I don't really mind ants, unless they are farming aphids at which point they become problematic. At which point it's time to kill the aphids. Neem oil is a pretty good natural aphid destroyer.
Using any pesticide is grim, IMO. We're putting enough poison into the environment as a side-effect of day-to-day life, and the last thing it needs is people deliberately adding more.