I use a wide screen (200+ columns) but articles are wrapped at 80
columns.  So I often see this (any highlight will do, as long as it
changes the background color):

text text text <b>BOLD BOLD[column 80]bbbbbbbbbbbbbbbb[column 200]
BOLD</b> text text

Where "bbbbbbbbbbbbbbbb" is a continuation of the background
highlight to the next line.  It looks ugly.  Here's a screenshot: