A lot of large organizations purchase domains that are similar to theirs to avoid typo-squatting as well as the impersonation you pointed out. The creation of

A lot of large organizations purchase domains that are similar to theirs to avoid typo-squatting as well as the impersonation you pointed out. The creation of new TLDs in the last few years only increases the permutations. For example: http://google.com http://google.com http://com.google http://com.google