Thanks for all of the advice guys but I think I may have given you guys the wrong impression..

my father isnt an alcoholic...its just that everytime my parents drink they tend to fight a lot and its big fights (so im worried one might go wrong)

so yeah....like someone said....i was gonna propose the idea today while my dad is going through a hangover but i havnt done it yet....

im actually thinking about sending my mom an e-mail with everything i want to say in it....its much easier for me to talk that way...and i can get across everything i want to say. I think if i include that I am being completely serious and im just trying to care for their relationship then she will listen.
She would propose the idea to my father and he'd probably try it out. But im not sure. Ive got a bit more thinking to do