Even if there “might” be a toeles in posting a story, and you would have to consider each case individually prbably asking a specific shailoh in each case, the resulting negative comments are not l’toeles. The tone, nature and direction of those comments far outweigh any toeles there may have been in posting the comment.
The comments are not a way of dealing with the issue, if you feel it is something that has to be dealt with. If you have read comment strings you will see that overwhelmingly most comments are not meant to correct a situation, rather they seem to either put down whole communities, defend what was done, denigrate other individuals or communities or to respond to the comments that were posted.
In addition, on certain sites, the story is titled or written in a manner that indicates that the purpose has nothing to do with toeles, rather pure loshon hora.
And I know that R’ Hoffman wrote about this elsewhere, but I do not agree with his position. And I am not aware that he is a posek for the community at large, if he is accepted at all. And I asked a shailoh to my rov and he too strongly disagreed with R’ Hoffman’s position.