I'm sorry to hear about your history, John 
Going to have to disagree with you though:
And if there is to be sex ed it should not be of this wooly, 'don't do anything that makes you feel uncomfortable but it's up to you' variety. It should be: don't sext ever, it could ruin your life. Don't send pictures of your penis to girls. Don't proposition girls for sex. There should, in short, be some sort of moral instruction: not just advice. Young people require clear moral guidelines.
Nope. I was raised in a religious family. This meant no sex outside marriage. Which meant as soon as one was considering anything beyond kissing, it was "wrong". (Which incidentally made it a bit more exciting! Remember that most teens will rebel against or at least disagree with parents). So once you'd crossed over into "wrong" territory there was no advice, no guidance, beyond that provided by magazines (they were actually quite sound!), peers, and anything from school (I don't remember covering consent and relationships and stuff, only biological side). I was encouraged to see the predatory side of men - but without discussion, so the apprently nice men I fell for didn't seem to be the "bad type", so I didn't realise the things they'd say and do for sex...
(One sibling (25%!) did stick to the no sex outside marriage rule, and seems fine with that. However, he also is on the ASD spectrum, and as you well know one of the traits of this type of mind is a rule-based reasoning, so perhaps that explains your similar viewpoints. And reminds us that people ae all different so a variety of approaches may be most useful).
I think "case studies" of different scenarios, really hammering home potential consequences, especially regarding sharing of images/video and the permanancy of digitial images, is a good idea. I don't know what current sex/relationships ed is like though.