That said, I think Stallman's position really is fundamentally wrong and problematic.
Legally, sex with underaged people is rape regardless of consent. Morally, that stance really is justified in the most common circumstance - when the non-underaged person has more power and experience than the underaged person. In the case under discussion, you have that in spades, double spades.
The sad thing is that individuals interested in freedom, who make serious contributions to some things called free, don't notice that the massive imbalances of wealth today have produced a situation where simple "free choice" is made a mockery of.
And yeah, the thing about inquisition atmosphere, imo, is that it doesn't reveal the rot behind all the "mere" abuse of power.