I think LC is more well known that CC, it's way more active for a start.
Any kind of verification is going to fail especially in what's supposed to be an anonymous website. You can't stop people from partaking.
Best thing you could do is just make CC or whatever space you're trying to create be as aggressively feminine as possible. I don't mean cutesy kawaii or "lets talk about makeup and boys!" I mean talk about shipping, fandoms, fanfics, periods, female-oriented/dominated hobbies, mental health, feminist threads etc topics that men just aren't really into that much. LC and PULL have a lot of women because they're first and foremost gossip websites, men aren't interested in gossip.
CC's problem is just lack of activity and it attracts negative activity every once in a while. I think CC was probably where I saw many horrible pictures for the first time and oftentimes when I open this website I have to hold my breath.