I was recently temp-banned for [[[allegedly]]] using this client - "suspended for using hacked client" lol. I have not tried (Turn the option 'Disable client swap' to off) as seen above. I WAS getting disconnected by switching weapons; I was probably, hypothetically speaking, using sprite hacks. No posts/videos online about me hacking. Not sure what exactly got me banned, and they won't answer my request for proof, but watch yourselves.
Related: anyone know how long a temp ban is? They didn't tell me lol.
All I know is that the first ban is 7 days. If you keep getting caught hacking, the ban will be longer or even perma.