BLU is also prohibited from roulettes and the public duty finder, with the only possibility being to premade or undersize, so I'm not exactly sure how you jumped to this leap, of: "Well BLU allows it, therefore it should be ok". Not really comparable lol.
Not sure why this was highlighted either but let me make my point abundantly clear that the dungeons we'd be entering would be with complete utility kits would far exceed that of which the dungeon was designed for. I'm not really sure what to say if you really think a Samurai being able to do Midare > Kaeshi: Setsugekka is a good idea in a low-level dungeon, besides.. Knowing other people, they'll get just as toxic because "You aren't the level I think you should be. Griefing!"