Let's not go crazy
I haven't been terribly active in years, but I still occasionally re-write or cleanup articles I read.
I used to primarily contribute content through copyediting, wikifying, referencing, and categorizing. I have contributed substantially to a few articles: Antioch College, Aryan Brotherhood, Loretta Lynn, Myrtles Plantation, and Sean Bell. I am also able to provide GFDL licensed photos.