Guess I need to spell out exactly how this relates to your post:
I can see why people might be upset. They bring their kids to a wholesome franchise that they have grown up with, expecting to usher in a new generation, and they are hit with lewdness that they didn't anticipate. PG-13 should have warned them that some skin might be involved, but in my opinion the threesome was beyond the pale. I am not a huge Star Trek fan but it's similar to Star Wars in that I too have introduced my kids to that series like many Star Trek fans probably have. Plus it's the same director, and if he pulls the same thing next year by adding in this type of unnecessary lasciviousness, I will be equally unhappy as the people to whom you refer.