Semantics. Point is not all rules are in the EULA.
FDev have stated that they feel combat logging isn't valid gameplay, and regardless of whether it's moral or not them's the facts. While it hasn't been explicitly acknowledged however, the rule becomes irrelevant in a group like mobius' under normal circumstances, because it's only purpose is to stop players avoiding death by pvp and there's not supposed to be pvp in mobius. It was introduced by deciept and against group rules, but within FD's. Realistically SDC are exploiting the fact that FD haven't MADE a ruling about this situation.
So TECHNICALLY the combat loggers broke a rule that was irrelevant in their circumstance because they were provoked by a group exploiting a loophole.
FD have given their opinion (one I share, when the 'logging' in question involves someone who has voluntarily engaged in combat, or knowingly played in a context where combat could reasonably be expected). Their opinion does not form part of the EULA contract however. It isn't a 'rule'. It is an opinion.