Perfectly legal. There is no alliance ownership in regards to which side of the Rack you are looking at. If you score an autonomous ring on the other side, it counts just the same. Running into a robot during the autonomous period has no penalty, and is in most cases, bound to happen.
Good luck!
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2013 Season-Long Fantasy FIRST Elgin Clock Award Winner - Peach Alliance
Since 2008
2012-Present: FTC #5875, GENIUS
2008-2012: FRC & FTC #1002, The CircuitRunners
"Invention, my dear friends, is 93% perspiration, 6% electricity, 4% evaporation, and 2% butterscotch ripple."
~Gene Wilder as Willy Wonka