I was using eaglercraft signed offline file, and I touched the Chromebook screen which activated touchscreen. this got me banned (I don't even have any advantage on touchscreen, you can't aim). Please unban me.

Dawg, some people get touchscreen chromebooks now?

https://arch.lol/support

If you believe that your punishment was unfair, you should appeal it straight away, and not continue playing using an alternative account.