The case was very similar to people saying Microsoft is evil(TM) simply for the sake of it. It happens when a company is successful. In the last few months I've heard people saying this about Google, which used to be the darling of all tech companies.
There is a very interesting entry at the SpreadFirefox blog: Spread Firefox, but don't be a fanatic:
"In my opinion it's ridiculous to have "loyalty" to a company. I base my evaluation of products only on their own self-worth and merit as a product, and not on any pre-conceived opinions about the company that develops it or distributes it. Generalizing about the software of one company as a whole is, frankly, narrow-minded and readily worthy of ridicule".
"I think that a lot of IE users just see that they are getting pushed by Firefox users to switch, and don't like it that people are telling them 'My browser is sooo superior! You should switch, because your browser sucks.'. I'm not saying everyone does this, if you don't then thats good, but many people take this approach, mostly when dealing with people on the 'net that think IE is the best browser. This is not a good approach to take, and really its rude and inappropriate. It pushes people away, and thats not what SFx is about.".
How true... So, think about this before posting a rant that is not directed to a product or service, but to a brand.
And, most importantly, when debating on a forum, attack the ideas, not the people...
By the way, the action was to ban a user and warn another one.