If it helps, I tend to be frank/blunt to an uncomfortable extent. I sort of try not to because people find it off-putting, but I also sometimes don't notice I'm doing it. So it's not like I am in opposition to what you are saying, but I don't necessary see that it would be so great.
(re being able to reply, there's a speed bump built into the site, if you click the time stamp through to the individual comment page you can always reply there)