Sabotaging Customers: I have no reason to believe that they would ever sabotage me.
Restricting and Shafting Customers: I have never had a problem with my kindle or any other media from Amazon. If I ever do I'm sure I can find an alternative source in a matter of minutes.
Censorship: They are Amazon's servers and it is their right to enforce their rules on them. If Wikileaks believes that they were unlawfully cut off then they should take Amazon to court.
Exploiting workers mercilessly: good luck finding a retailer that has not done this at some point. This is an unfortunate reality as far as I am concerned and while I support fighting for better worker's conditions, I see no reason that refusing to buy through Amazon helps the problem.
Shafting others in the publishing world: I'm not a publisher, their industry is none of my concern. If Amazon is so bad for them then I'm sure there is another way they can sell their books.
Dodging Taxes: The government should close tax loopholes. I don't blame Amazon for being competitive. If it's legal it's fair as far as I'm concerned.
Other reasons: These all seem to be trivial to me though I don't feel like typing out the reasons why.
I've never had a problem with Amazon particularly and this article seems rather strange to me.