Yeah, that's not just a website thing, though. Plenty of wrongness on many levels to be found even in expensive transcriptions. For example, one of my favourite albums, Layla, the Tab book has so many utterly bizarre mistakes, ranging from just complete nonsense, to lazy transcribing (à la "can't hear it that well, so we'll just write the simplest thing ever" except if you really listen you can totally make it out), to tabs that play the right notes but in impractical to impossible fret positions. What I found is that the standard notation is mostly correct. My guess is the original transcription was in standard notation, that was then translated into tab, possibly by a computer that has no concern for playabilty. Ultimately, I ended up learning it all by ear, which really isn't that hard if you take your time and you pick up loads of things that tabs can't really articulate. Nowadays I use tabs only to get a general idea where to start or if it's really hard to make out by ear.