I read a story about Jimmy Wales, Wiki's (co)founder. Not able to find it, so it's probably apocryphal.
Apparently, Wales met a woman at a party and asked his personal assistant to find out everything about her - "but don't use Wikipedia", he was said to have stated.
In areas where I do have experience, I see that Wiki comes very close to factual truth. Politics & religion not so much.
I was "watching" a cricket game on CricInfo where the current 3 highest run-scorers were all playing. It was amazing to see the all-time run ranking table change literally seconds after a run or runs moved the player up a notch. Same thing goes for motor racing. I suppose some people need a life.