Tipped robots are annoying to everyone, although they may or may not benefit your alliance.
BUT... Unless you are in an elimination match, or a REALLY REALLY intense/close match that you are completely set on trying to win as though it was the finals, if you have the ability to pick up another robot, I would do it.
For starters - more scoring will happen afterwards
- it is a really nice thing to do
- the team will be happy that you saved their robot, 6 weeks of work, from possible destruction, and you will probably make new friends

always good to have lots of fun
- what teams out there, scouting around, could possibly overlook a team that helped another team up? It means you aren't in it just for the win, but for the experience. It means you're probably a fun team to work with. It means your robot is pretty awesome, because it has the ability to right an 120lb tipped robot.