It has been a really long time since I've needed to tell lies in order to use a web site. It began with Linux and using browsers that didn't jive with the "optimized for some crap" plague of stupidity that was so widespread barely a handful of years ago. Some real competition in the browser genre from Firefox kind of leveled that particular field ('playing' excluded from the previous statement for the obvious reasons) and has become the lesser evil browser for a lot of more conscientious folks. I have a gazillion problems with FF myself for a list of reasons that I've spit out far too many times to do again here but I think, for the most part, that FF is a force of good generally and I'm glad that more people are using it. Firefox has done a great job of working itself into the replacement for the blue 'E' and that is good work by itself.
The most interesting side effect of the wider use of *other* browsers is that web content is now a process of negotiation instead of being entirely controlled server side. I use Opera so I can do an alarming amount of shit with your presentation/delivery without using anything external to the browser itself. It requires a bit more twiddling than installing a plugin for FF but nonetheless I can block the hell out of some advertising without strapping a bunch of extra crap on to it. That ability, if you're not using stock IE as your browser, is pretty much a given these days which makes the stupidly clumsy attempts to demonize client-side configuration so utterly baffling. It doesn't fucking work and trying to make FF users out to be some kind of thieves and your own lame and utterly ineffective blocking of a browser as some kind of bulwark for bad business models under the guise of free enterprise just tags you as an idiot without a real plan.
So, I'll be switching my user-agent to Firefox for an entirely different reason. I don't want to participate and I'd much rather skip your crap entirely than enable you to make money by simply loading up a fuckton of ads when someone is somehow deceived into following a link into your mire of scam-tastic link farms. That is my right as a user of search engines who is seeking real information instead of SEO crud du jour. I'm waiting for the next genius statement of theft from someone who opposed visitors to their site without a Flash plugin installed or using a screen reader. How am I supposed to make money on my flashy/blinky/twitchy ad thing if people won't install software/get over their disability to see it. Good fucking riddance.