This is an issue with the forums themselves, or rather the default theme.
If you change a paragraph style to code, when viewed on the dark blue background the code is also very dark so it doesn't really show up, or has to be selected in order to be readable.
See below:
Pretend this is some code
Not that we probably need to post code much here, but it's useful to have another style for putting tags and other search terms, rather than having to use the quote style.
On a related note, the paragraph style menu itself seems a little messed up too (a lot of options are crushed together rather than on their own line).