It's not a requirement but it is the common convention. Wikipedia has stricter style guidelines that go against that convention but in the absence of such a st

It's not a requirement but it is the common convention. Wikipedia has stricter style guidelines that go against that convention but in the absence of such a style guide on HN, one can see why common convention would typically be followed. Agree in general though; I don't know why this convention exists and suspect we may be better off without it.