You could also just use CSS's
direction property and reverse the direction of the letters, such as your source code might look like this:
Code:
<span style="unicode-bidi:bidi-override;direction:rtl">moc.elpmaxe@elpmaxe</span>
Leaving a user to see this:
example@example.com
Since spam bots more or less parse the HTML source code for the page (as opposed to a human reading and seeing the page output), all the spam bots would see is moc.elpmaxe@elpmaxe, which would leave you free of spam.
