If you use gmail, you have infinite variation on your email. They let you add a + and any characters between your login and the @ symbol. If you use this for each thing you sign up for filtering becomes very easy.
EX:
username+pyramidair@gmail.com
username+ingo@gmail.com
username+alottaspam@gmail.com
Then if someone starts spamming you can simply filter that unique e-mail address right to the trash.
EX:
username+pyramidair@gmail.com
username+ingo@gmail.com
username+alottaspam@gmail.com
Then if someone starts spamming you can simply filter that unique e-mail address right to the trash.