Gentle question, Flyblue: Would you be happy to think that your son might accidentally find himself sitting next to an adolescent girl who decided to accuse him of touching her up?
Yes, children must be protected. But should that swing over into an assumption that no-one under the age of 18 can tell a lie, exaggerate or just be confused? Or grateful for a bit of attention?
Many weird bits of earthbound human interaction seem to be intensified in that tube at 38000 ft...
It still seems, IMHO, that the best measure is to give FAs the chance to use their judgement and common sense, rather than having to move any single male seated next to UMs, regardless.