Facebook is disputing ownership of 21 domain names that include the string “facebook” such as KillFacebook.com, FacebookStuff.com and FacebookSafety.com reports TechCrunch.The domain names are all currently owned by a company called Domain Asset Holdings, according to the report, a known domain squatter based in Potomac, Maryland.When visiting websites for the domain names there are notices saying they are for sale. For example, facebookstuff.com is currently for sale for $350 and FacebookCheats.com for $4,000.The TechCrunch report is available in full at techcrunch.com/2011/03/24/facebook-tries-to-squash-21-squatted-domain-names.