As a pretty heavy user, I actually only rarely see something out there that I consider inaccurate.
Not saying it is the best way to learn... but I actually think it has a whole lot to recommend it over the old Encyclopedia set we had when I was a kid.
Absolutely. Also, Wikipedia is genuinely super easy to edit, and if anyone is sure they've found an error, what's stopping them correcting it? You may need a reliable source, but that's not usually too hard, and there's no better way to get across the message that anyone can edit than doing it yourself! DS and I put in a redirect one time when we looked some mineral up under one name and only found it under another, i.e. we made the alternative name we'd first tried redirect to the correct article - even that was pretty impressive to him.
A friend of mine once confessed that he'd tried to convince his child of the danger of Wikipedia by inserting a false statement into an article just before the child was about to use it as a source. Didn't work, because the false statement got removed in the 10 mins between his inserting it and the child looking. (I am not recommending this, though!)
In fact, far commoner than outright errors, IME, are articles that are confusingly written. Structuring an article well takes a lot more work and skill than correcting the odd fact. Still, it's where I go first, too.
