If I add a Addon domain the document root is under "/public_html" by default, i.e. "/public_html/addon_domain_name".
Is there anything to notice when I change that to "/addon_domain_publich_html" so this does not "pollute" the "public_html" folder of my primary domain or is it totally ok to do that?
Thank you for posting. You do have the option to change the document root for your addon domains. Here's our guide on doing this.