In all honesty I don't believe we're witnessing anything new here.
The primary difference however is the Internet provides more avenues for people to comment on other's appearances.
The National Enquire and other store rag newspapers have always had a field day pointing out overweight celebrities.
Joan Rivers used to blast Elizabeth Taylor for being fat. "She's the only person I know of who stands in front of a microwave and says, (Hurry up!)"
That was back in the 80s! Another difference today is we as a society have become much more sensitive and politically correct.
Everything shocks and offends us today!
No one today would suggest making a TV show where a large bus driver routinely threatens to punch his wife to evoke laughter and yet "The Honeymooners" is considered a "classic" sitcom.
Foster Brooks made people laugh imitating being an alcoholic on "The Dean Martin Show". Dudley Moore was nominated for an Oscar playing a "funny drunk" in the movie "Arthur"
Cheech & Chong sold millions of albums portraying stoners.
Richard Pryor used the "N" word in most of his jokes.
What has become (the new norm) is using such terms as: