This is a very very interesting point. We definitely seem to be in this strange parallel universe where things got super "safe", yet other things got unsafe.
For instance, in many many many PG kids and family films of the 1980s, you could have endless swearing(including the F word) Yet now, PG films can barely have any swearing.
Yet again, today's PG-13's are pretty much R rated movies in a lot of ways violence and theme wise.
Tv comedies of the 1980's were rather tame, and when sex was approached it was a cautionary tale or tongue and cheek referenced. Yet today, with "TV 14" shows like CBS 2 Broke Girls, even the most graphic sexual acts are explored and referenced.
As well, basic cable tv shows like Walking Dead can have Hard R/NC-17 like violence.
(but they can't show boobies!) Compare to pre late 70's shows, where married couples were depicted in separate beds.
Society has also become both open yet not open. In the 1950's a mixed race couple known as Lucy and Desi were shown on tv, even celebrated. But mixed race was illegal in many states and many viewed mixed race as wrong. It was not really until All In The Family where the topic of deep seeded racism was explored. Yet today, there still has never been a tv show, comedy or otherwise where a white/black couple are depicted together. However, we now have a number of comedies and dramas depicting gay couples as normal people and not charactatures.
I believe it was an error for Steven Spielberg to augment and change his beloved film ET(in a different way that many of us were upset over Luca's augmentation of the original Star Wars trilogy of course), because it came from this self projected sense of political sensitivity. But there are many examples, like the warning on the Old School Sesame dvds, where people of today have this bizarre sense of deciding what they want to nanny.