I actually think "banning" someone is itself kind of childish and needs to be reserved for extreme cases.
I think the exact opposite. I encourage the mods to set high standards, tolerate little, warn quickly, oust almost as quickly. Send 'em back to their mums for some retraining.
Friendly forums, like CanonRumors and almost any photographers' community, should be filled with over-the-top friendliness, courtesy, support and a generally happy vibe. It needs to be over-the-top sugar sweet (but genuine) because written comms is terribly poor at getting nuance and intent right, we are not all Charlotte Brontë, so there really is no place for any sort of put-downs, sarcasm, or hostility, because even writers with no ill intent will find themselves posting things that look like they do have ill intent, or at least like they lack good will. Give up the subtlety, be really friendly.
Also, I don't see any '18+' box to tick before entering the site, so we can assume children are welcome here. I would certainly LOVE to think any young person male or female with an interest in photography, would feel comfortable browsing and learning here, and unafraid to post -- and not feel it is necessary to announce one's age first to avoid being bullied.
find your happy space first before posting here, and try to be part of building something fun and open-armed to all. And if that thought makes you feel sick in your stomach and tempted to post sugary sarcasm, maybe just park that post and stick to reading, or get up and do something off the computer.