Being a php beginner I don’t know what the code would be off the top of my head.
But if you make a code that says
if [email form] is blank, then [commenter email] = (fake email)
unless you’re happy with not requiring a name, in which case a setting in Settings > Discussion (in WP-Admin) will give you that ability
This happened for me as well.
I’ll check to see if I have that JQuery undefined error as well.