@jmsstuff, The plugin seems to be working fine in my installation.
I thought this plugin would “hide” the email address from the user? Or am I misunderstanding what it does?
This kind of plugins try to hide the email address from bots/crawlers, not from the user.
How does it work?
That means that hovering over it will reveal the address and the devtools will show it too.
As a side note:
HTML entities could easily be reversed to plain text by a bot which is a bit more cleaver.
Apart from other differences, from the perspective of a page author, the disadvantage of the Shortcode plugin is that you have to mark an email address in the page manually:
[safe-email]firstname.lastname@example.org[/safe-email]. The Antispam plugin automatically searches for email addresses in the page.