This kind of formatting is useful to denote sections and break up the wall-o-text effect in long answers.

For example:

 - https://serverfault.com/questions/49765/how-does-subnetting-work/49836#49836
 - https://serverfault.com/questions/214512/everything-you-ever-wanted-to-know-about-mod-rewrite-rules-but-were-afraid-to-as/214521#214521
 - https://serverfault.com/questions/339128/what-are-the-different-widely-used-raid-levels-and-when-should-i-consider-them/339214#339214
 - https://serverfault.com/questions/347606/recover-raid-5-data-after-created-new-array-instead-of-re-using/347786#347786

I think it's absolutely commendable to try to improve answer quality, but this doesn't feel like the right approach.