I guess he likes black people

Colonel stinkmeaner must have gotten sick of possessing tom Dubois and decided to possess this printer instead

Turn it off?

Frame them with appreciation

take out the black ink, then you'll get a blank page to recycle.

This is going to sound wacky, but maybe you should change the password on your wireless router from 'password' to something more complex.
Now, I am off to send you some more pictures. You need to learn your famous black authors...

unplug the printer, or just burn the pictures in your front yard so they can see it.