First of all, it was done by a budget company called The Asylum. Second, they have ripped off or copied every movie they've released to date (I Am Legend-I Am Omega, War of the Worlds - War of the Worlds lol).
http://www.theasylum.cc/index.php
Look through, it's hilarious. AVP wasn't great, AVH is much worse but if nobody cared about good movies being ripped off (not that the above examples were good :D ) Why would anyone care about the crap movies being ripped off?
They are not the first group of people to have no original ideas of their own and they wont be the last.
If that post took you two hours to write, you must have no arms and legs and type using will power alone.