Equally I don't think W & K should either. Taking sides as if it's a football team is repugnant. These are people's lives and constantly speculating if someone is going to get divorced, has a personality disorder, is generally a bitch is enough to send anyone over the edge. It's quite disgusting and I don't know how they're allowed to print this stuff.
I suppose those topics are speculated on in other forums (which I don't participate in) but I've not seen them brought up on MN. I don't speculate about M's marriage on here. I'm aware of some of the rumours, but they don't really concern me - I'm not interested in their intimate lives, only the effect they have on the UK and the RF, and certain individuals they've seemed to target.
What tends to happen on here, and I think it's reasonable, is that people comment on Meghan's (and Harry's) behaviour and utterances (both orally and in print). So - not gossip, not speculation, not 'making things up', but based on their actual conduct and what they've said. If you make yourself a very public figure - even a publicity-hungry figure - then that's fair enough. People are allowed to have an opinion and make reasonable comment.
I wouldn't support speculation about very personal aspects of their lives, but I've never come across that on MN in the time I've been here.