Nowadays, I also abide by the rule of "If it's my work, I don't create the page nor edit it." It's surprisingly easy to tell when an author is describing their own work, if you know what you're looking for.
I treat gaining
a TVTropes page as an accomplishment. If someone with no obligations took the time to make one for the comic, then something has clearly been done right. If an edit is made to cover a certain event in the comic, that must have been significant enough to be noteworthy. It's an opportunity to watch how strangers on the Internet describe, perceive, and analyze the comic.
Also, not really an active enough wiki-er to make a habit of editing public pages. *shrug* Still, it's a nice source of views - about 1 in 24 visitors per day.