In this case, in my opinion, the email address should be masked by a JS/php function. eg Joomla has built in 'Content - Email Cloaking' plugin it is default on in order to protected email address'es in a site content. This is a link to source of this function https://github.com/joomla/volunteers.jo ... lcloak.php
. Maybe it is a good idea to do somethink like this. HiFiKabin, maybe in new version of Your extension 'Obscure Contact'? This would be help to protect email addresses in posts content, too.