Anyone may freely open a thread on any forum abut anyone they like on any basis. It is not the position of site owners to censor these posts, which has not been done. A duplicate post was made by another member which was locked to focus the discussion in to one place, which was the correct thing to do.
To blanket email everyone about an issue that pretty much everyone is already aware of is not going to be beneficial. I'm not a fan of getting emails from forums. If I want to know what's going on within a forum, I'll log in, if I'm not logging in, there will be a reason, and I'll catch up when I can.
As for supporting vloggers, this forum I am sure would be there to help its members. Is M13 a member on here? Not that I can find, and not an active one if he is.
Donating should be a personal choice. Awareness of the incident and help campaign is running high, many vloggers large and small have put up videos about it, and you'd have to follow virtually nobody not to be aware of it. Thunderous 71 did a vlog on it saying if you can't or didn't want to donate cash, just go watch some of his vids to keep the ad revenue up for hum. Superb idea I think.