That's the great thing about the internet Bill, you don't have to "buy it" if you don't want to...it might get shoved on your screen but the choice is still yours, to believe or not to believe. Naturally if your researching for something more important
than your information should be based on a more verifiable source than an "internet wiki".
But if your just looking for quick reference, say to back up an argument/discussion your having on a internet message board, than you can make use of a wikipedia, it's fast easy and convenient.
Just like people using google, only what your looking for doesn't require you to wade thru 10-15 different pages.
Wikipedia is randomness, because the stuff you look up on it will be random...it's not work related stuff, it's stuff you come across and want to know what it is, doesn't matter how obscure it is, chances are someone on the vast intarweb has come across
it before and has typed up something and posted it to wiki.
Not perfect, but it's not required to be, that's after all a rule of the internets.