This is true, but most spam email is automated. You're still correct though, your solution is more secure (and also what I use). It's always possible the form

This is true, but most spam email is automated. You're still correct though, your solution is more secure (and also what I use). It's always possible the form you submit automatically strips the +whatever from your email silently. I believe facebook does this (at least when checking to see if the email you're using has already been registered).