I just read that SPAM is getting 30 today. Congratulations!
On May 3rd, 1978, about 400 mailboxes got flooded by the first unsolicited email advertisement in history! According to heise.de it is estimated that the current spam volume is about 100 billion spam mails per year. The signal to noise ratio is as low as 15%. To avoid SPAM you should use your (primary) email-address very carefully. Don't use it to subscribe to websites, don't post comments with it and do not put in on any website in machine readable form. Using strange character encodings or images to hide your email address is a start but will not hinder any serious web-crawler hungry for email contacts.
I personally prefer temporary email addresses or email-adresses I can deactivate when they get to polluted.