Obsfucation is not security.
What's to stop someone opening up the dev window of a web browser and disabling/editing the CSS file?
Besides, Q needs access to the name field by default (and personally I would just keep appending my name to the bottom of my posts if the name field was disabled).
JavaScript for disabling email:
document.getElementsByName("email")[0].style.display = "none";
CSS selector:
input[type="email"]
{
display:none;
}
You're welcome. Leave the name field in please (maybe just append 'optional' to the name field?).