G419      *Don’t tip or entangle. A ROBOT may not deliberately, as perceived by a REFEREE, attach to, tip, or entangle with an opponent ROBOT.

G211      *Don’t expect to gain by doing others harm. A strategy clearly aimed at forcing the opponent ALLIANCE to violate a rule is not in the spirit of FIRST Robotics Competition and not allowed. Rule violations forced in this manner will not result in an assignment of a penalty to the targeted ALLIANCE.

G417      *Stay out of other ROBOTS. A ROBOT may not use a COMPONENT outside its FRAME PERIMETER (except its BUMPERS) to initiate contact with an opponent ROBOT inside the vertical projection of that opponent ROBOT’S FRAME PERIMETER.

G415      Watch your ARENA interaction. With the exception of GAME PIECES, addressed by G410, a ROBOT may not damage an ARENA element. A ROBOT is prohibited from the following interactions with an ARENA element, except chain (see G416) and a GAME PIECE (see Section 7.4.2 GAME PIECES).