Go right ahead if you want, like it has been said, no-one is stopping you.
But I would never even consider it if it was me, I don't know why you'd even want to wear one, why it even crossed your mind. This is a formal occasion, meant to be a rite of passage. Graduation ceremony is NOT a party. People and family will be upset and make rude comments, which might just ruin the day for them AND you. It would also be extremely disrespectful to the whole occasion of graduation, as graduates are supposed to be in formal robes.
You may not be trying to disrespect, but you would be anyway.
If you want my opinion, save the tail for the party after graduation, wearing it there might actually be fun and have a point.