I strongly disagree. Getting a large mix of abilities and weaknesses is part of the fun.
If I captain a ship with a bunch of high level unlimiteds I sail it differently than I would one with mid to low level limiteds. Its part of the challenge.
Same sort of thing on the adult vs child separation. Some kids are annoying but you can just ignore them if need be. Adults playing with kids around keeps you "PG" and not devolving the game into adult conversations (no - not that kind

, well, maybe that too).
This is a game after all. About pirates. Kid stuff