I would be understanding if the CCC orga put him in the entertainment track, but they did not do that for two years in a row despite having received feedback.
He was intentionally spreading misinformation and the CCC orga supported him in that. These are simple facts.
His character and presenting seemed really strange to me. I was honestly totally confused by his presentation and couldn't make out if this was supposed to be funny or if he is serious.
And if it was supposed to be funny, I didn't find it funny at all.
All in all, I was really irritated by his talk and avoided all his talks ever since.
reading your comments, it seems that was the right choice
At first, I thought he was going for a darker Brooker-ish humor, but in the end, the lack of research showed. I got the impression that he tried to shoehorn some corner-case examples into the general "Perl is a security nightmare" narrative.
It could have been someone else, but it sure sounds like him. It's a bad thing to do in a talk either way.
Edit 1: I've found a rather angry response[1] to the talk I was thinking of (Perl Jam 2). This is just for reference, I don't necessarily share the blog post's opinions.
Edit 2: Here's the Bugzilla[2] "bug".
[1] - http://blogs.perl.org/users/joel_berger/2015/12/response-to-...