Yes and no. I usually do not ding-dong ditch, but my friends convinced me to do so, so I gave in. Each time I wanted to hang out with them, they wanted to ding-dong ditch a "psycho" mother (though...
It is a form of Harassment or Trespassing, which can get you arrested if you are 18 years old or older (adult). If you are under 18, you can be fined by the family if they chose to do so. If you are...
No it is not until you do it profusely, then it is considered harassment. They can file a police report for trespassing on private property. Trespassing on private property is illegal.