Are high school or college freshers subjected to ragging by seniors?

That did not happen to me at UC Davis, no. I was much less aware of what class people were in in college than I was in, say, high school. Maybe because there is a much starker difference between a 14-year-old and an 18-year-old vs. the difference between an 18-year-old and a 22-year-old. I was the only freshman in my first upper div linguistics class; no one batted an eye other than the professor showing some sense of being impressed. 

The practice is shameful and childish.

As a HS frosh I smarted of to a senior, who then proceded to toss me butt first into a trash bin. Hard lesson, but well deserved.

i would hope not, i wasnt