wait, do people who read bnha realize that there's no such thing as 'quirk suppressants' or 'quirk-cancelling' handcuffs/drugs/etc. in the HeroAca World currently? There's nothing. There's only Eraserhead and heavy sedatives to stop a person's conscious altogether (and formerly Overhaul's bullets that were the first of its kind).
Like, that's the reason for why Heroes are allowed to use heavy force, and why Tartarus and it's straightjackets are a thing? A good part of the conflict hinges on the fact that the world can't easily take away a person's supernatural ability - that's why quirk use is so suppressed and Villains are treated so harshly and no one had any idea what to do with kids like Toga or Eri (before being taken in by UA/Eraserhead) who couldn't control their quirks besides telling them to not do it, or that they're bad for not controlling themselves, and finally abandoning them.
When you have no good way to inhibit someone's quirk with a simple injection or electronic collar, you'd end up trying to prevent them from using their quirk in whatever physical way possible: restrain them by tying up their arms or putting a muzzle on them, lock their hands in metal boxes, put them in a confined space with a gun trained on them, keep them under anesthesia for months on end, and so on. You end up treating them like they're feral, rabid beasts that can't be controlled, as ticking time bombs monsters who are capable of any thing at any moment and needs to be subdued as quickly and completely as possible.
Still laughing at endeavors “disguise”, I see where dabi gets it from
Masters of disguise - Todoroki family edition:
Enji, Rei and Fuyumi are all partial to silly hats, Shouto and Touya both change hair colors and Natsuo’s disguise is that nobody ever gives a shit about him…