Having to enter my email on a site is a major roadblock. Enough sites keep sending me unwanted mail that I seriously hesitate before signing up; I don't give o

Having to enter my email on a site is a major roadblock. Enough sites keep sending me unwanted mail that I seriously hesitate before signing up; I don't give out my email unless I'm pretty sure I know what I'm going to get, and I want it badly. I often use a mailinator address when I'm not serious about signing up. It's very convenient.