Perhaps this is the genius of Wikipedia - it keeps many of those of a certain type of personality occupied amongst themselves while using the energy of their machinations to produce a product of wider social good.
You know ED heavily dramatizes stuff right? (It's in the name) They also have a huge hate boner for Wikipedia in my experience. Anyway, I think it's unfair to call the community cancerous when in this case archive.is was spamming Wikipedia with bots. Spam from any website is spam, regardless of how useful, and in this case it's a severe breach of the community's trust. Anyway, archive.is was recently removed from the blacklist, so it's silly to paint the whole community as "cancerous", which is also a juvenile term to use.
I'm not necessarily agreeing with the OP here and I don't even know what the community is like but this seems a decent page to start[1]. I do like how Wikipedia keeps a page on it's own controversies - I mean it makes sense, but I like that they're open about it.