I wondered if this happened much. When exiting the gates of Leinster House on the day in question, I met one man wearing a T-shirt with the brand "Camel" on it and a young woman wearing a T-shirt that had "Campbell's Grouse Whisky" written across her bosom. These are not things I would associate with wearing T-shirts and I was quite surprised to see them. They obviously exist, however, and until they are pointed out, one may not notice them.