I've been on MN since 2001 
- ds is now nearly 22, but I've long since progressed from wanting/needing/sharing parenting advice (although I still do some of the latter, using the benefit of hindsight experience
) and now use it mostly for Politics and BootCamp threads and the occasional Relationship, AIBU or amusing thread (and Sporners Corner is my guilty secret
) 
I've always known and not been bothered by the fact that there are
men on the site. It is after all by parents for parents which has been its tag line for as long as I've been on here. And [checks notes
] men are parents too 
There are a few men that I "know" are men - such as DGRossetti on the long running Westministender/Brexit threads (sadly no longer contributing after the botched MN "upgrade"
), PigletJohn, PRH47 (I know that's not quite his name), Pan2 on the cycling threads, the odd as in infrequent contributor to the MN HFLC BootCamp threads and so on.... I don't give a flying fuck that they're men as they contribute positively and respectfully to those threads. 
I've learnt a lot from different perspectives on here - people from different backgrounds, experiences, incomes and (
) sex. I've learnt about dysfunctional relationships, especially via the Stately Homes threads, which then meant I could be more understanding of dh when he came belatedly to realise how abusive his childhood had been and the long lasting impact of that.
If I don't like certain posts or posters I'll either scroll on past, report (if abusive/suspected trolling), read in amused disbelief or hide if the thread as a whole starts to really irritate.
Long may the diversity last 