Can't prove him wrong, but I can suggest this.
If you're tailing someone, and you plan to arrest them, why not see where they're going first?
Which is more valuable?
The one guy, or the whole hive?
How does ant poison work?
>They take the poisoned food back to the hive.
Wouldn't do too much if it took the ant out the moment he touched it!
Why aren't things happening RIGHT NOW?
Simple, we're on someone's timeline.
Who's timeline are we on?
The answer: Q's.