"My greatest fear, though, is that sex-positive parents may be next targeted by despotic law enforcement/child protective services/governments, much like parents who are targeted for having pictures of their children naked in a bathtub."

You had better believe it will eventually happen. Big Government of a socialist nature that is taking on as Good Government ...in the USA.....will eventually stop this venue and expect to see families destroyed as children are ripped from their sex- positive parents that will be accused of sexual thought crime and anticipated 'possible sexual abuse.' They will eventually throw people in jail for 'preventing anticipated crime' if the person/s deemed a risk to society and it's socially correct dictates. Mark my words here. Watch and see.