Plugin to hide or mask email address...

Asking the experts...

Let me preface this by adding that I'm new to programming/creating custom plugins.

Having said that... Upon entering the General Tab of a Constituent record, is it possible to create an plugin to mask or hide an email address if that constituent has a certain attribute?

The interceptor portion of this seems straight forward; however, it's the plugin portion that im questioning.

Any assistance would be greatly appreciated.

Cheers,

Brad