I’ll tell you what really bothers me – when people bash those following the Shulchan Orach! There is a halachic chiyuv to drink, as stated in the Gemora and all the Poskim. You cannot simply ignore the halachos that you do not like. The halacha is that we drink, so we drink; end of story.
“they are not 21(where it is legal for them)”
So what? If it was only legal to keep Shabbos for those 21 and older, would you say those under 21 shouldn’t keep Shabbos?!
“last year I took away a bottle of wine from a 16 year old and spilled it out right there in front of him.”
Did I mention that another thing that really bothers me is when people are oiver the issur di’Oraysa of “lo sigzul”?
“Tell me what example are these parents and Rabbis setting by allowing them to drink?”
That we should always follow the halacha, no matter what people like you say.
“Isn’t Purim about being happy and having fun?”
No. Purim is about being mekaiyam the mitzvos of the day – megilah, mishloach manos, matanos li’evyonim, and drinking.