I think it would be more tidy and readable if an "as is" option will be enabled at posting comments.

I'll explain:

When I post a comment on a question page, like this:

"This is my comment.

Thank you for helping me out, it's really appreciated.
Hope to see you next time."

The output of it on the page would look like the following:

"This is my comment. Thank you for helping me out, it's really appreciated. Hope to see you next time."

Now, this may look to you a readable comment - well, it is.
But when one's comment is long and contains code example inside of it - Well that's just unreadable and messy.

Hope you understand what I am talking about :)

Thanks a bunch, wonderful place!!