The key word to be searching for is “ungrab” mouse. here is a stackexchange on this.. On some systems ctrl-alt-/(on keypad) might work, but that is often disabled for security.
The worst is that if the ‘wheel’ group is empty, it will give a root shell to absolutely anyone.
It’s not like any place on the internet is all that friendly once it grows more than a couple dozen people.
@trachemys
@iusearchlinux.fyi