Here's one solution.
1. First use some email obfuscator to crypt the e-mail address. One example is: http://www.fingerlakesbmw.org/main/flobfuscate.php. The good thing about this one is that it doesn't use JavaScript to hide the e-mail address.
2. Change TinyMCE to use numeric codes for characters in the settings: Modules -> TinyMCE -> Advanced.
3. Open the page you want to add the safe e-mail address. Go to the HTML view and paste the code you just created.
Now you can get a mailto: -link without spammers getting the e-mail address.
If someone has good ideas to how to make the process easier for average users, let me know.
