For hacks that don't access program memory directly, would external hardware make things less detectable? I don't know how anti-cheat programs work but I'd be surprised if they banned every skilled player that happens to be running AHK and OBS. More likely they work with heuristics that try to detect super-human mouse movements, precision/speed-wise.
> For hacks that don't access program memory directly, would external hardware make things less detectable?
Yes. But, it's a game of cat and mouse. Anticheat always is. There's not been a need go to the level of "there are X players who report having a Razer deathadder, which we've validated as having a DPI range of Y-Z. With your OS settings, it's not possible to have achieved that with that mouse therefore we suspect you of cheating". But we're probably there now.
> More likely they work with heuristics that try to detect super-human mouse movements, precision/speed-wise.
It's heurestics all the way down. You're unlikely to be banned for AHK+OBS, but a heurestic on what you're doing with the combo might ban you.