The "before 0900" bit in the OP gets me. It seems incredibly condescending - as though teenagers are not worthy of travel before 9am.
Should he be found guilty the suitable punishment should be given. We can't go round inflicting harsh sentences on someone because of their age (make no mistake, this is about his age. Why else would the first word be "Teen"?)
So you make two comments.
It is unusual in North Wales for yobbish behaviour to occur on a train before 0900. as the sun was not up,it is unusual for this type of yob to crawl from under his stone so early.
I would have put up this thread, no matter what the age the yob,
It is unfortunate areas of Rhyl & Colwyn Bay have two of the most deprived wards in Wales due to drugs. This awful behaviour I am sorry to say reflects this.
I lived in Wellington Rd Rhyl for 25 years, have friends in Rhyl & travel to the town often.
Bob