Capchas are bigger hassle than spam. I just had to type in a captcha to send a blasted email from my Yahoo account, and it actually takes me longer to enter the code than it takes me to type the email. This is supposed to prevent spam, but it is more annoying than the annoyance it is designed to prevent.
Sure, I use word verification on my blogs. But that is to prevent porn ads from being posted in the comment section. I'm trying for a PG rating on this blog. Porn ads in my email inbox I can just delete.