A lot of people post links to their items on sale in the marketplace on the forums. This is an awesome way to expand the marketplace outside of Facebook friends. However, this only works well when people label their links correctly. Unfortunately, sometimes items for sale are mislabeled, or even posted as "Reward Share" items. Sometimes its an honest mistake caused by people mixing up their links and sometimes its done to deceitfully gain gold, but either way it is a problem.
Heck, this just happened to me. I clicked a link that was labeled as a reward share, only to be congratulated for my purchase of 20 olive oils.
It seems silly to me that there is no confirmation window. A simple "Are you sure you would like to purchase _______ for _______ gold? ,yes/no" would suffice and keep people from making accidental purchases or scamming others.