Spam Mail Trick

I come across so many web sites that ask for an email address just to do a download or to access some site and then spam that address.

Mailinator does a neat trick for me, I just think of any name @mailinator.com and enter it to the site and then go over to mailinator.com and type in the address that I gave and login to the site!

I know you can do it anyway by creating a dummy mail account at hotmail and then provide that but the past part here is that you don't need to remember any passwords to check the mail, just the address would do.