Can anyone clarify the legalities of 'pulling CONCORD'?

That’s been reverted by the CSM and CCP to „all pulling is legal“.

This particular GM tried to unilaterally change the rules and invented some made up „ask yourself ‚for what purpose‘ are you pulling“ without putting any thought into what he was saying: if a miner pulls CONCORD onto his grid in a belt to defend himself, and then another miner pulls CONCORD in a different belt to defend herself, then BANNED by this GM’s excellent lack of logic because both are trying to pull CONCORD defensively but are having the offensive effect on the other.

Thus, effectively banning pulling while pretending to pass it off as something else. This GM had other behavioral problems like [REDACTED].