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Yes, I am aware. The point of my comment is that Wikipedia obviously does not block wget.

The point is that if it becomes a problem they'll just block that particular useragent.

The point is that you can use -U to specify arbitrary user-agent strings, and -E robots=off to ignore robots.txt.

User-agent blocking is completely braindead. It does nothing at all. The fact that somebody in 2012 can possibly think it works is astounding to me.