You know your summaries are good if smaller third party sites supporting the illegal downloading of said shows are using your summaries. The least they could do is at least credit you, or the site at the very least.
If not, then there is always the official summaries they could use or Wikipedia, which allows people to use freely.
He probably is only using TVRage because our site is becoming a pretty big deal (8,873 on Alexa, considering there is over 100 millions of sites out there), and stuff. Those kind of sites are KIND OF sort of illegal-ish (I think websitting is the term, nott sure though)