alright, I don't generally like to shut down lines of inquiry but I don't want people killing this game before it's even out yet
I've already said that "non-obvious" bans are a last resort in every game, no exceptions. I'd like to retract the "non-obvious" part of this statement.
First: FPS communities never actually "ban" maps. They have map pools, which are selected so as to streamline the competitive meta around the (usually) five, seven, or nine best maps for competitive play. Expecting players and especially teams to learn more than nine maps, especially when many of these maps are community-made (see Quake, CS series, TF2), is unrealistic and weakens the overall level of play (since more time is spent focusing on learning maps than honing fundamentals). Furthermore, many of these maps are designed for anything from 1v1 to 64v64; picking maps that are not suited for the game size would also be counterproductive. These are not bans. Splatoon, meanwhile, is 4v4 only and has a five-map pool. Each map is designed for 4v4 and 4v4 only. Any map bans, even after more maps have been added in a few months' time, would need to be justified to such an extreme degree--since none of the usual reasons to exclude a map from the pool can logically apply to this game--that nobody could possibly know what this justification would entail, require, or result in until well after the game's release. Therefore, discussing map bans is utterly pointless at this stage.
Second: Weapon bans in FPS games occur, again, in the case where a game's competitive ruleset represents only a small fraction of the possible rulesets that can be followed (TF2 is almost entirely capture point, CS series is entirely demolition, CoD4 was S&D, in spite of each of these games having plenty of other modes available) and these weapons make no sense in the rulesets that are being used, and even in these cases, only TF2 has widespread bans (due to the signficant differences between comp and pub games) and CoD4 only bans equipment (because explosive equipment is designed for deathmatch with killstreaks, not S&D 5v5). Again, Splatoon is designed entirely around the game modes we'll be playing. What we are intending to play competitively represents 100% of the ways the game can be played online. And again, this removes the usual reasons to remove aspects of the game from competitive play, and leaves us with the task of testing each and every aspect of the game before we arrive at the point where we can even begin to consider banning anything. Therefore, discussing weapon bans is also utterly pointless at this stage.
Third: Gear being used or not is not a question of banning. Either you enforce default gear only, or you enforce unmodified gear only (so no additional perks on top of the ones the gear comes with), or you allow all gear. I believe the consensus is that these three options are the respective worst case, likely case, and best case scenarios. Discussing what we are going to do with gear is a matter of rulesets, not bans, and this discussion would appear to be on hold until we know more.
Most importantly: Even if discussing bans at this stage were not pointless, it would still be harmful. Discussing bans, especially on contentious issues (imagine polling the community about banning rollers after the first testfire session?), centres any future discussion on the ban itself rather than how to counter whatever it is that people want banned. By having bans on the table, we stifle discussion. By discussing bans before fully understanding how the game works, we risk leaving the game in a perpetual state of underdevelopment for no reasonable gain (when people who could be figuring out how to beat this contentious thing are preoccupied arguing about banning it with incomplete information). By banning one thing, we set a precedent for banning further things. And, lest we forget, if something really is unsuitable for competitive play, people will naturally move away from it with no need for a ban until such a ban is trivial. Discussing bans this early on is pointless, harmful, and unnecessary.
So, yes, discussing bans is categorically a terrible idea. I would be exaggerating to say that the discussion would kill the game, but it definitely has potential to harm with no benefit.