Tell someone to look up an online IQ test, and have them take it. They will surely return to you with a huge score. If they are bragging about it, surely their IQ is below average, and if they printed out a sheet saying they are a genius, they are retarded.
Seriously, !@#$% all of these shitty online IQ tests. I'm so sick of stupid people posting their "IQ" on their signatures/myspaces etc, not realizing how stupid they were to believe the !@#$%. I find that the overwhelming majority of those tests are made by novices who just end up telling you what you want to hear anyway. They make poor questions, and give poor results.
Not only are the online brand of IQ tests of extremely low quality, but IQ test in general are tremendously flawed. There are countless aspects of human mental function that you simply can not even begin to identify through test results. The idea of quantifying intelligence has also always escaped me.
I've always been stubbornly against taking IQ tests. The only one I took was at age 8, and whatever it was, it got me into the gifted education program. I did a few pages of an online IQ test, and I quit halfway through after having determined that it was flawed. I just took a few online recently, though, just to give it a shot. The predictable happened, and every result was something outrageously high, like in the 160-190 range.
I declare that we find the creators of such tests and impale them in public.