I'm sorry that some people think the mere fact that Smith (allegedly) had sexual relationships with girls much younger than him is proof that he is a sexual abuser.
I've known people who have been in relationships with very big age differences. It always seems odd to me, but it would be wrong to suggest that all such relationships are abusive. As long as both parties are old enough to consent, such relationships can be fully consensual.
When I was young, doing my A levels at an FE college, there were a few cases of youngsters (m & f), of about 17, getting involved with lecturers who were much older than them. This was gossip-worthy, but not scandalous. Later at university there were gossip-provoking liaisons between students and lecturers, but nobody (as far as I know) claimed that such relationships were always abusive.
How attitudes have changed! And the law has changed too. Things I remember people doing legally in the late 70s and early 80s would now result in sackings and prosecutions.
If Smith is guilty of sexual harassment he should have been thrown out of the ToyTown Bolsheviks long ago. If he is guilty of rape he should be sent to prison.
If as a 50-year-old he has the habit of picking up girls young enough to be his daughter, call him a dirty old man, by all means, suggest that he might be happier with a woman of his own age, fine, but if the relationships with the youngsters are consensual that on its own should not be grounds for disciplinary action, expulsions etc.