Our company has found that form submissions are not as secure as we need them to be. Anyone with the form link can submit an item that posts to the source sheet regardless of security permissions. In essence, with the link, Customer X can post an item to Customer Y's sheet. Please consider adding another level of form permissions directly on the form to allow a sheet Admin to designate "restrict form submission to authorized users". This would eliminate the ability for users who do not have access to the source sheet to submit the form and post on the sheet when checked.
