why is it some content posted by member's is displayed as a single long line making it hard to read.

for eg look at the below thread

http://www.dev-archive.com/forum/showthread.php?s=&threadid=239525

the content goes long and i have to scroll to and fro horizontally to read the msg. this is too hard particularly if the msg is lengthy.

i know that this problem arises because the users key in like that. but, why dont u correct the way it is displayed ?