Balog,
Not sure how you got to child molesting there, as last I checked that was not legal for adults to do, whether in the presence of children or not. Note that I'm referring to activities that are unquestionably okay for adults to engage in, even if those same activities aren't appropriate for children (like smoking.)
Just because you think sex is a more important issue "no matter how you cut it" doesn't mean everyone else will agree. The fact that there is disagreement about these things should give you and everyone else pause in this case, as the next case may just have the effect of stigmatizing your chosen hobby (ie, guns).
Labeling something an essential truth has been done for thousands of years in debates about this sort of thing, and it has not once in recorded history definitively ended such a debate.
Getting on the band wagon and demanding dismissal for this teacher feels great when you think most people will agree with your position. It will not, however, feel so great when in the future a majority of the urban types now being raised in America view your guns the same way you view this teacher's home-video hobby.