Creating a G+ Account for Our Sending Addresses

We send from two addresses (one marketing and one transactional) and were thinking it would be a nice touch to have both those addresses have a branded avatar in Gmail instead of the generic one (seen below):

One of the suggestions I saw for how to do this was an old StackOverflow article: http://stackoverflow.com/questions/9620366/send-email-with-an-avatar

I was wondering what the community thought about any potential risks to making G+ accounts for our sending addresses.

Thanks for any thoughts!