The issue of coloured textures getting players banned already happened several times in the past, mostly on native. From what I recall, each time it created a lot of discussions, especially around the severity of the punishments. And yet each time, the admins stuck to their ruleset, only reverting the punishment on one occasion to target the specific individual at fault, rather than the whole team.
You can argue all you want, the truth is there is no win-win possibility in these kinds of situations nor is there a 'fairer' option that out rules all others. But pretty sure everyone agrees it sucks for Janne (who obviously didn't seek to gain any advantage) or his team if they end up disbanding due to the decision.