There are varying degrees of acceptability when it comes to commemorating NHL achievement.
Stanley Cup Champions gear is practically mandatory if yours is the last team standing in the tournament, both to celebrate history and to rub it in your buddies' faces that, if only for a year, their teams were clearly inferior.
Conference champions gear? Not exactly required if you won the big prize. Not exactly a point of pride if you lost in the Finals, but it's still an impressive feat to be one of the last two teams playing that season — especially if it was an unexpected run. So, yes, let your conference champs freak flag fly.
Division champions gear? This exists for (a) fans who simply want to marinate in their team's annual success by buying up every piece of swag created and (b) fans who want to honor a singular achievement in their franchise's history (says the guy who owns a 1988 Devils Patrick Division Playoff Champions shirt).
But what about a regular-season achi...