There's been a lot of research on "socially responsible" investing. It generally shows that (not surprisingly) this investing style significantly underperforms non-constrained investing. Steve Bainbridge has his own idea for a fund - investments that will tick off the "right" (or is that the "left") people. He's accepting investment ideas, so drop on over and chime in. All the usual suspects have been named already, so you'll have to work a bit.
Note: if you want to read some serious thoughts on the costs of socially conscious investing, here's a piece by Gezczy, Stambaugh, and Levin available free on the SSRN. So, Steve's idea will cost you, but you can justify the losses under the heading of "entertainment".