I've started using a simple PHP function to mangle email addresses into the #&64; style codes on mailto: links when I'm creating web pages for other people. As far as my own email is concerned, it's all over the net already and there's no point in trying to protect it.

I make a point of not publishing my postal address on the web - I think that's a more serious security risk.

My home and mobile phone numbers have been public property for years with no discernible ill effect.