I'm not inclined to google translate a lot of pages in Finnish, but can't it be that "crowdsourced" here means "a series of articles written by the unverified authors?" Which would be quite funny given their topic.
I don't know and I'd like to hear from somebody who does, somebody who understands Finnish? The same person could try to estimate if Jessikka Aro's articles were strongly biased?
Note: I definitely don't doubt that a lot of nasty internet communication was directed to her. The state of the internet is, you can be the saintest of the saints, once you're public enough, there will be (at least some) hate. I'm just trying to figure out how disproportional the reactions were, it's hard for me to get the idea reading only on this blog post.