A few years ago I was invited to be a part of a symposium on etiquette and the design of interactive media (organized by the Association for the Advancement of Artificial Intelligence). I hosted all the papers and presentations from the symposium (links to which I will post later, since the pages have to be cleaned up a bit for this new server I am using). A fallout of this symposium was a special issue of the Communications of the ACM on this topic. The article I wrote for this special issue is given below:
Mishra, P., Hershey, K. (2004). Etiquette and the design of educational technology. Communications of the ACM, 47(4), 45-49.
A brief description of the article is as follows: Motives for designing tact, courtesy, and even humor into educational tools must be intrinsically understood and appreciated before applied.