Hmmm. Just say whatever your brain produces, and if somebody has a problem
with what comes out, it's on their own plate.
Living in a country where that mode of thinking is the norm, I can tell
you it also has disadvantages... If only because the resulted hurt
feelings can muddy the discussion more than you might think. Besides, it
chases people away who would otherwise have contributed constructively -
it's not acceptable behavior in all cultures. Ever wondered why the FOSS
community is still predominantly western, despite many smart developers in
countries like India?
A little decency now and then doesn't hurt. I know people who, knowing how
blunt they can be, ask someone else to read certain emails before sending
them. After all, reality is that people DO have feelings.