Every single day, Amazon users are harassed by other users who have nothing better to do than stalk and bully other people. On Amazon, there is no way to stop it and people are harried by these people all the time. Goodreads has a blocking mechanism on their site to protect their users and keep bullies from voting or commenting on their reviews. Facebook and Twitter also have a similar mechanism to protect their users. Amazon does not and it sorely needs it.