Good question. My first idea while reading your email was to neutralize his power over you. In interpersonal relationships, information is only powerful if/when someone has it and the other person doesn't know or doesn't want it disclosed. Someone sent me this clip recently from the Stephen Colbert show. The gist was that the guest was a "person of interest" in the United States' war on terror. Although not charged with anything concrete, the POI was asked to remain in touch with the FBI. In part in compliance but more in protest, the POI began sending the FBI many emails a day with photos and other information about his daily activities, including pictures of his meals and toilet breaks. At the end of the clip, the POI advocates a "market approach" to combatting government overreaching for information. Specifically he argues that information is only valuable to intelligence agencies if they are the only ones who know that information or if the party that is the subject of that information does not know that they have the information or does not want it disclosed. By making his information not only available to the FBI, but publicly available on his website, he has robbed that information of any value.
Similarly, a lot of people have tried to identify me from the blog. I know that it is basically inevitable that I will be outted in some way, so I have plans to sort of out myself -- or a glass closet. By outting myself in a way that I am comfortable with, I hope to remove the temptation for others to out me.
Other than that, ways of getting one up on him are probably context specific and situational. Just being aware of opportunities will help out a lot. But it's good you're doing this. He's much less likely to keep you in the toy box if he sees you as a playmate rather than a toy.