Here is a snippet from my Windows hosts file...

   # DONT DO IT!!!  DONT DO IT!!!  DONT DO IT!!! [times 30]
   # DONT DO IT!!!  DONT DO IT!!!  DONT DO IT!!! [times 30]
   # DONT DO IT!!!  DONT DO IT!!!  DONT DO IT!!! [times 30]
   127.0.0.1       news.ycombinator.com
   # DONT DO IT!!!  DONT DO IT!!!  DONT DO IT!!! [times 30]
   # DONT DO IT!!!  DONT DO IT!!!  DONT DO IT!!! [times 30]
   # DONT DO IT!!!  DONT DO IT!!!  DONT DO IT!!! [times 30]

The line in the middle changes from being commented to uncommmented several times in the day.

Sigh