In case you've been doing the Rip Van Winkle bit for the last ten years or so, be advised that the country is in the throes of a youth rebellion. The young today are very idealistic: they hate hypocrisy; they really care about the environment, world peace, civil rights and self-expression. They also like rock music, long hair and marijuana. But they're not so enthusiastic about rigid bureaucracies, the Vietnam war, the profit motive or the two-car suburban garage. They are suffering from alienation and this is dangerous to our Democratic System. Therefore, a little tinkering with the Status Quo is in order. The Ripon Society which adheres ""to the Republican party not for what it is but for what they can make it become"" has a few suggestions: (Are you listening, Mr. Nixon?) Let big business and the military be more tolerant of long hair and mod clothes; ""combine government employment with community service projects""; remove the legal debilities on 18-21 year-olds; expand international exchange programs; build youth hostels; give the young worker some tax relief: get 'em involved; let them find a niche where they can enjoy ""rights appropriate to their responsibilities"" and cautiously, very cautiously, legalize marijuana. Whew! And the nostrums go rolling along. Introductory platitudes by Sen. Howard H. Baker (R.), Tennessee, who issues a vigorous call for more ""militant moderation.