Are my parents right to take drastic action to stop me from drinking alcohol?

for the past couple of weeks i have been sneaking out the house while grounded to go to parties etc, as i am only 16 i am not allowed to drink alcohol, but i have been coming home drunk, my parents went mad and said that they were worried about me drinking and if i sneaked out again they would have no option but to lock me in my bedroom to keep me safe as well as a punishment, 2 days ago i ignored them and sneaked out to a party, i got drunk and returned home at 2am my parents said they have had enough and the next day they locked me in my room, i have been LOCKED IN all day and my parents have said i will spend all of tomorrow locked in  my room as a punishment, i will be let out for christmas but after that i will be locked up , my parents have said that both my uncle and antie died very early because of alcohol and they dont want me to go the same way, my parents know i have lots of parties to go to after christmas with alcohol so thats why the are going to keep me locked in for my own safety as well as a punishment, i know my parents mean well for me but i HATE being locked in my room its HORRIBLE advice please from honest parents ?