I also disagree with a perm. ban for the skin usage. Let us not forget that DD2 is usually boosted, so many people are not even in our forum, having read the rules. We could implement them in the server, with /rules or editting the motd, but there's no indication that makes it obligatory for any player to come here and read the rules, and check them often for any update or to recall any rule one might have forgotten. Besides, I also agree with some people here that claim a perm. ban may be too harsh, it's not like a wallhack that is obvious usage for advantage, skin usage can be for fun and we can force them to have the custom ones, but many people like having different skins(don't make me remind you of CSGO where people pay hundreds and even thousands of dollars just for a knife)...
So yeah, I'm for a short ban, like a warning, to not use the skins again in Ambrosia servers. I wanna make clear I haven't watched the demo(yet), but seeing everyone talking about the skins I guess we're past the cheating accusations.