Even the MPAA disagrees with you. While movie ratings have become more lax, each of Abrams movies is a PG-13 rating. With the exception of Nemesis, no movie was over a PG rating.
(1) MPAA ratings from different decades aren't comparable.
(2) MPAA ratings from the same era are, often, not comparable.
(3) Star Trek: First Contact was also rated PG-13.
(4) The PG-13 rating didn't exist until July of 1984, so the first three TOS films couldn't have been given it (and obviously weren't going to be rated R).
Thanks for the info, Harvey. I had thought the PG-13 rating came out sometime in the mid-80's, I just couldn't remember when.
I'm not surprised Star Trek: First Contact was PG-13. It was pretty violent and graphic, much like TWOK.
I just wonder why some people keep remembering Trek as nothing but sunshine and rainbows?