[zahlman]

> If I had to guess where most of this traffic is coming from, it's from compromised smart appliances contributing traffic to proxy networks.

... Is the data earlier in the article supposed to support this hypothesis? I'm not saying it doesn't, but I would really appreciate having more lines drawn and dots connected here. And what sort of checking are people supposed to do, exactly? And how?

[inigyou]

It's just an assumption that residential proxying hasn't become a legitimate industry by now. Security professionals just assume it's still based on botnets.