Can you move the game objects (i.e. weighted goal posts) onto other robots? And use them to trap them/keep them stuck cause they cant move from the weight?
While my word is not official, that maneuver can be tagged as one that is purposefully aimed at the harm/destruction of other robots and therefore be deemed illegal.
Just pick them up and trap them by placing them around the robot 
That rule is one of those rules that’s not a blanket red tape rule as much as a guideline for the competition that rarely comes into play since teams read it and understand this isn’t battlebots. I wouldn’t assume any strategy would fall under that rule, unless you execute the strategy with the aim to disable a robot (e.g. ramming into them with a goal)