The post is supposed to be a bit tongue-in-cheek (and is tagged so), the fact being I am a New Zealand company who does have any known customers or affiliates in the EU but I also have no idea what WordPress or its plugins do in the background if you say enter your email for an RSS or comment feed.

I think lots of non-EU and non-technical bloggers would likely see the email I had (which was just opportunistic marketing spam from a European company and not nefarious) and think they were in breach of something like you say they are probably not.