one man's crappy site is another man's precious precious wikipedia (see: all the disagreements that have already come up here over what to block). Personally I

one man's crappy site is another man's precious precious wikipedia (see: all the disagreements that have already come up here over what to block). Personally I prefer knowing that those sites are in the index, but don't show up unless I purposefully widen my search to include them (or they appear so low in rankings that it achieves the same effect).