[Jeffy]

Absolutely!
Contrary to what has been said above, I think this is the way to go if you can get three quick scorers.
If you have an extra robot hanging tubes, each robot can traverse longer each trip to offset the time and as a result, you throw less tubes and steal more opponent tubes. IF you steal enough tubes, it can severely limit the opposing alliance. In this case: The best defense may be an offense that is precise and stealthy in its tube usage.

Also, if the robots can score quickly, they will only be in each others way for a small amount of time.

PLUS:
Contrary to popular belief, three robots do fit in the scoring zone, as long as they are not trying to score on the same peg.