The things you mention are already illegal. The effective proven solution is to enforce existing laws, to punish and deter bad behaviour like any other crime.
This incongruence is why a lot of people don't take the reasoning at face value and see it as only rhetorical justification for increased surveillance, which is widely understood as something the state wants do do anyway.
How do you deal with a crime that isn’t reported due to things like shame?
Not to say that we need to scan messages to enforce nudes not to be sent, but I don’t think you can say “just enforce existing laws” and be done with it, it’s not that simple.
If people don’t report crime then we have to leave it. The answer can’t be just to invade everyone’s privacy looking for crimes (before they’re even committed!)
Of the crimes that are reported, I think a lot go nowhere.
The lack of proper enforcement breeds distrust. The government already has access to WAY more data than it needs and... nothing is happening? People are still getting unsolicited dick pics and nobody seems to care?
The only reasonable conclusion is that the government wants the data because it wants it. The crime angle is just one that is easy for people to swallow. See also: think of the children!
Perhaps His Majesty’s Government could establish mandatory thought scanning using cutting edge technology[0] to ensure that no crimes go unreported due to shame, dishonesty, or threats. Just step into the scanning booth once a week, a minor inconvenience to ensure your safety. Surely you have nothing to hide?
I posted a reply here https://news.ycombinator.com/item?id=46599842 that addresses why I think "this is already a crime" doesn't go far enough, and why these laws are being introduced.
This incongruence is why a lot of people don't take the reasoning at face value and see it as only rhetorical justification for increased surveillance, which is widely understood as something the state wants do do anyway.