ftr myself and a couple other users have played around with Ninjask pass and it honestly isn't that bad lol (idt I saved replays but others did iirc). It's certainly not better than Combusken but I don't think it's fair to assume that Combusken is the only legitimate Speed passer without any evidence on the opposing end either.
This post annoys me because, you speak of Ninjask-pass being not "that bad". But is it broken? I highly doubt you would consider it broken, and if it isn't it should not have been brought up at all in the suspect thread. Neither should any form of other speedpassing, such as AgiliPass. Sure, these strategies can be worked, but if you don't think they are broken then you shouldn't be voting to ban BP + speed. As Ryan said, "If you genuinely feel that Combusken alone is the problem, you're probably best off voting no ban."
Now let me discuss why I believe Ninjask-pass or Agilipass are not problems. Ninjask pass has always been a thing but for the majority of time it has always been regarded as a gimmicky strategy. Why? First of all, Ninjask's very pathetic offensive presence when not holding a Choice Band makes it hard for it to force out other pokemon, and then set a Substitute, and get off a pass. If you look at the NU Viability rankings, the amount of common pokemon that Ninjask can force out is extremely low. There are a few, such as Lilligant, Malamar, and Jynx but it pales in the comparison to the amount of things that just straight up beat it 1v1. Just sending speed without an intact substitute is definitely workable but it's a very difficult strategy for Ninjask to pull off because Ninjask invites so many dangerous heavy hitters in (for example, Archeops, Magmortar, Charizard, Rhydon, Aurorus), which makes it very hard for the baton pass recipient to get the boost without taking big damage in the process. Now compare Ninjask to Combusken, something that may actually be broken. Combusken can force out a huge number of pokemon due to its fire-fighting typing. It can actually set up Substitutes on multiple pokemon due to Bulk alone as well (if holding an eviolite). You can't just hit Combusken hard back hoping it can't send anything in, because unlike Ninjask, Combusken can deal huge damage on its own to its opponents. Combusken's typing also synergizes well with its main BP recipient, Xatu, and with Malamar. And it doesn't lose 50% of its health to Stealth Rock. Ninjask isn't even comparable to Combusken in terms of efficiency, and is very clearly not broken with Speedboost + pass.
As for Agilipass and RockPolishpass, there are a wide variety of pokemon that can use the two moves in NU. (Combusken, Scyther, Smeargle, Swellow, Ariados, Beedrill, Dodrio, Emolga, Farfetch'd, Fearow, Floatzel, Girafarig, Gorebyss, Leavanny, Ledian, Lopunny, Masquerain, Minun, Ninjask, Plusle, Rapidash, Sawsbuck, Lunatone, Solrock). However this strategy suffers from a major problem that makes me highly doubt it is broken in any way. You cannot use moves while getting the speed, as you can with Speed Boost- you cannot set up a Substitute and get a speed boost, or attack the opponent while you are getting the boost. That means most of the time the pokemon are forced to take a hit while setting up Agility. And then later again the recipient will be forced to take a hit because it is a fastpass, not a slow pass, and there is no Substitute behind it. Since strong pokemon like Floatzel and Scyther get the strategy I'm sure it can be used to some degree of success. But you would need several high-level replays to convince me it's actually broken.
tldr: usable strat =/= broken strat, don't vote ban if you think only chickenpass is broken