For those who want to test this out, here's a feedback suggestion on the testing server. Don't test it here for the love of all that is good. You may need to log in first; people who joined since December might not have an account ported over to the testing server yet. (It gets refreshed basically whenever necessary.)
I can click the "submit my post" button when leaving a feedback comment a number of times. Sometimes I double-click it by accident and end up leaving two comments. Thankfully I don't do that too often, but anyway.
Can we have some duplicate protection on the comment submission button?