Here's another reason (of many) that I like Google:
If they block some results, for any reason, they will TELL YOU.
Right there at the bottom of the page. Not in tiny text either. They practically bold it and surround it by flashing lights.
Yahoo didn't. Bing didn't. And I couldn't find any results that they were showing that Google wasn't (because maybe they weren't asked under the DMCA to remove any results), but Google also shows more results on the first page (15 vs 10@Yahoo vs 14@Bing).