Oh my god at the amount of conspiracies and arguments here.
I have no use for this mod, but people should respect those who do. I'm sure some people chose to Block MS and their Browsers for similar reasoning.
Personally, I think the notion of "browser discrimination" is very '90s, but like I said people are free to do what they want with their sites. There's also nothing stopping browser users from changing their user agent
It would be good if people actually read all the information themselves before making their decision though, rather than going off 3rd hand information.