I can offer some suggestions of people doing work that intersects disability studies and internet studies - Gerard Goggin, Christopher Newell, and Katie Ellis are the first names that come to mind. A lot of the work done in this area addresses the issues of accessibility and so forth, but also extends to issues of inclusion and participation for people with disabilities. In any case, there should be loads more research on trolling being published soon, with the upcoming issue of Fibreculture: http://fibreculturejournal.org/cfp-special-issue-for-the-fibreculture-journa... Frances.
There are a lot of researchers in the area of disability studies doing interesting work - I'm not really very aware of anyone doing work that crosses disability studies with internet research, but I am going to go ask a friend now if they do know of some - it seems to me that there's a nexus of interest there that someone should be exploring. You're right to point it out, and I want to acknowledge that I see the value in having you point to it, even tho I don't really agree with how you went about it.
best,
--elijah