In a test comparing the effectiveness of different obfuscation methods in 2008, the obfuscation method "Using ATs and DOTs" received much less spam than "Replacing @ and . with Entities". Assuming that the 2008 test is an accurate model, this plugin should reduce over 99% of spam without compromising accessibility.
"CSS display: none" should not be used, because screen readers cannot read content styled with
display: none either. Reversing email addresses and using ROT-13 encryption are obviously not accessible, either.
Yes. Any email address with a TLD (top-level domain) of two, three, or four characters would work.
Yes. Use the form
user AT somewhere.co DOT uk.
Remember that the
DOT must be all uppercase (capital letters). You can also try going to Settings and change the replacement method to "Walk the DOM", which is the new default for version 3.0+.