Just because something works doesn't mean it won't blow up later.
(Try draining the oil out of your car. Just because you can start it up and make it out of your driveway or to the end of the block doesn't mean you'd make it to the store and back...)
but if you're asking whether it's a good convention or not, let me ask you -- why would you want to do that?
Because I have several test databases in phpMyAdmin, and I wanted to sort this new database to the top for organizational purposes. (I'm an organization freak.)
I would not do that for a production database, but it would be easier on my eyes during development.