There is nothing wrong with a spool on the street. I've ran mine for 2 years like that. Sure it chirps a little bit, most notably on smooth concrete at a filling station. I don't see how or why people say they are difficult, or produce bad street manners. It's a 100% predictable rear end. I would avoid driving if it's anywhere near damp, but I did get stuck in the rain and drove an hour on the freeway in a down pour and didn't have a single incident.
I've bolted on my M/T ET Streets and roamed around with a spool and slicks countless times.