If she has been fired because they're being DDoSed, that's a miserable precedent for anyone who works at a tech company.
Granted you're just saying that _if_ it's because of the DDOS this is inappropriate. I'd agree, but I doubt that's the reason, unless it is just what happened to draw their attention to this.
For what it's worth, I think 'evangelist' is a stupid title and 'advocate' is better. Yeah, 'evangelist' sounds cooler, but evangelists get in your face about unprovable stuff and harass you until you comply - not something you want to evoke in your job title. The standard joke about door-to-door evangelists is that you shut the door in their face.
I totally agree. It feels like a sort of toxic leakage of what should be safely contained in disreputable corners of the internet.