Now there's a man who's missed the point by a few thousand miles.
Mr Ehrlich sir, you are mistaking blogs for being similar to newspaper columns like yours (oh yes, I'm sorry, I forgot, the Independent don't want you anymore do they?). By their very nature they shouldn't be editted and may contain a lot of material you don't want to read. The point is, you don't have to!
In general they're not going to be cutting edge journalism. They're just the people recording their thoughts, etc for the world to see (if they want to, which you clearly don't, but that's not a problem).
Why shouldn't people talk about things they don't know a great deal about? What's wrong with people recording their tasting notes on the internet if they want to (as noted above, you don't have to read them). Not everyone will be able to record an accurate description of the wine so that anyone reading it could have a good idea what it was like, but you're at least going to get an idea of whether they liked it (ie a window into the views of the untrained consumer).
Surely the blog represent the epitome of free speech. Why limit that?