Tehwalrus makes an excellent observation. The role that anonymity played for OP on YT would serve her well on other communities like Reddit.
Specifically to your remark on the questionable 'positive impact' of Reddit: I would argue that it has done a great deal to heighten the visibility of the Free and Open Internet/NSA stories and cases of corruption or injustice. There's a lot of insensitive humor, but I'm not going to say my (or anyone's) opinion of that matters, as long as no one is hurt or put in an inescapable position.
The bigger point remains: Which web-communities depend on anonymity? As OP's story highlighted, clearly she (and presumably others), as a Youtube user - depend(ed) on anonymity.