If you are an adwords qualified professional and you use the site in relation to your business then I think you have a legimate use of the domain and you are not using it in bad faith. However, I take your point that its troublesome.
However, as the .pro extension is intended for professionals and as there are a lot of adwords agencies etc I think there is an argument for using the name perfectly legimately, also I can't imagine a user getting confused between the .com and .pro extention.
Just think it would look pretty cool on a business card for someone in that business.