Usually people tend to replace the ‘@’ with some short replacement like ‘{at}’ or ‘bij’. This just doesn’t help.

Any programmer with a bit of knowledge of regex can create a program that scans for domain names and interprets every small bit of text in front of it as an @ sign.

Some smarter people also replace the dot. This works, unless your email-host uses a easily recognizable TLD (.com) or domainname (gmail.com).

Also putting ‘SPAM’ in your email-adress some.personREMOVETHISFORSPAM@foo.bar is easily filtered.

Best thing is to use something out of the box.

For instance, my email address is X@Y, where:
X = bas.westerbaan
Y = gmail.com
Also I’ve got an email-address on w-nz.com, namely bas.westerbaan.

Or even maybe w-nz.com@bas.