I thought about this thread this weekend on the bike.
The key words in the question are Alone and With Headphones.
Having logged a few too many solo rides as of late headphones come in handy part of the time.
I can't help but think it might be safer to have a mirror regardless of tool/fred status.
Durain, I cant tell if your question is for real or not.
are you riding with phones and have you used the mirror. I know you dont have a bling bike so....