Major Hacker Conference Organizers Accused of Ignoring Harassment
gizmodo.com
gizmodo.com
I think it's worth noting that no proof has been presented publicly, and to the contrary, 2 of the alleged victims have denied there being any sexual assault. So at least to a certain degree these are targeted attacks. Whether he was targeted because he sexually assaulted someone else is an open question, but there were some false claims.
http://www.zeit.de/kultur/2016-08/jacob-appelbaum-rape-sexua...
Germany has laws on harassment, and so does probably every other western country. If you've been harassed, it is your right to go to the police and press charges.
And ffs, don't do fingerpointing on Twitter. We don't live in the dark ages, we don't burn witches anymore.
As for witch hunts, folks do get burned in the digital age, whether as result of posts on a public twitter feed, or worse yet in some cases, privately via other social media channels or other (digital) communication mechanisms. Publicly outing someone or a group is perhaps a last resort, but necessary in some cases.