I am surprised kids still do this, as others have said, since cameras are so common these days.
Our neighborhood does the "Boo" thing at Halloween where you anonymously leave a bag of candy for someone on their doorstep by ringing the doorbell and running. Then that person makes a treat bag and "Boo's" someone else by leaving treats on their doorstep, ringing the bell, and running away before they answer. With all the doorbell cam's people now dress up in masks and hoods to hide their identity. LOL. Its fun.
That's not the same as a good old fashioned ding dong ditch though. Yes, I would be very annoyed if it happened at that hour. If they did it before 9:00 I would be irritated, but would get over it. Are you sure it was kids? that seems really late for kids to be out. Do you have a doorbell camera? If so, are they hiding their faces. If not, somebody's camera may have picked them up