Ah, Daniel. You don't have to if you don't feel comfortable doing so. It's good that you want to confront and battle your fears but never push yourself too far. What matters is what you're feeling is positive, not negative.
I get exactly the same. I hover over the submit button - and chicken out at the last minute. Once I actually did it, then went on my profile, saw it, freaked out again and immediately deleted it before anyone would have seen.
It's not for the exact same reason so we're not in the exact same boat, but I'm sure neither of us have anything to worry about, in terms of 'backlash' - like you said, I've never seen a bad word on here since the admins cleaned up most of the forum trolls. Maybe it's time we both took the plunge! Best of luck :) xx