Re: He should have stuck to what he knows
There's a very odd passage in the linked article: "the [MIT] administration created a very specific and well thought out policy, which basically says that any relationship where two people are in different positions of power (professor*-student, director-staff, etc.) cannot coexist with a sexual/romantic relationship or any type of sexual activity."
My own marriage was, I suppose, technically a staff (research assistant)/(research) student relationship although there's not much, if any, difference in power there. But in my undergrad days the wife of the acting head of department had previously been his research student. Later, n the department where I met SWMBO, one of the lecturers was married to a technician. It's not uncommon for people to meet their partners at university and not entirely unusual for those to be in different roles.
This rule seems to be harking back to the very bad old days when a married woman had to resign or the nearly as bad days when a married couple couldn't work in the same department. AFAICR even in our case we had to check that that wouldn't be an issue.
My advice to the people drawing up this sort of policy would be to be very careful what you wish for.
* AFAICS in the US any tenured member of staff seems to be termed a professor. In the UK this is not so. For comparative purposes a university lecturer would have to be regarded as a professor in these terms.