Illegality vs. benefit
Let's throw another couple of scenarios into the legal wrangle.
Take the blogger who reuses your content by using a title, an excerpt, and crediting you with a no-follow link. While this third party site is not a splog, you could still argue that your copyright is being infringed by a mix of factors such as that your brand is somehow damaged, there is no added public benefit, and because the blogger profits from SEO-induced traffic assisting the conversion of clicks on adverts alongside your material while compromising the marketability of your original work.
The blogger's in breach but, then again, a tweak to the facts may change your attitude.
This time, let's say the difference is that the blogger has a PR5 site, is relevant to your market, and is giving you a follow link. Everything else is the same.
Note
SEO, PR5, relevant site, follow link, H1 tag, HeadSpace2! ... what the hell?
Look, if you're an online content producer and you don't know what these things are then...