punishment does not fit the crime
Parents get two years each for serving underage children alcohol.
I think its obsurd that we have a 21 year old age limit on drinking. I think its also obsurd that a parent can not decide to introduce alcohol in a responsible manner to their own children to counter the bigne / secret drinking stage that many teens hit. Drinking has been made taboo and thus its more dangerous because people go overboard on it.
I do however feel that these parents crossed the line with misleading other parents and serving children other than their own though, for that, they should be held responsible.
I feel 27 months is a bit much however.

As I know more of mankind I expect less of them and am ready now to call a man a good man upon easier terms than I was formerly.