that is of course going to work, but image the following situation:
sdöafjköasljfösdalfjödslkajföladsfdsalökjfödsalkjfödslakjfsaölkjföalskjdfaölskfjasödlkf
and so on for 1000 characters - this is going to brake your layout. That is why we set a limit for line length. And we add the <br /> tag in the post.
The right way to work with this is to find out how many characters you want to have per line and then set them.
The comment system should break the line at the right place - something that we don't do right now. So could you try the code in the other post?