I really really like this shot!!! It's so simple, yet perfect! lol Nice job thinking of a good idea and not screwing it up with a bunch of distracting stuff. that's what I would have done! :-)
Pin is nice and sharp. The detail in the purple is a bit distracting. I like the unbalanced nature of the pins position, which is a nice juxtaposition (I've been wanting to use that in a comment for ages) between the theme of "safety" and the risk of an unbalanced, open "safety pin".
From my experience, these minimalist type photos often don't fare will in voting, but I hope this one does well. I like it. Well done.