If you tell people that you bought stuff in the internet or even in a shop with Bitcoin, people will become aware of Bitcoin, more so if the stuff that you are showing them have value when you bought it with fiat money, what do you think about this?
Those who do not know about Bitcoin will definitely be amazed because you have acquired the item without paying any fiat money. Then they will definitely get interested but later found out that they have to buy Bitcoin and undergo trouble setting up a wallet and securing it. Though it is a great way of promoting Bitcoin I think ordinary people that don't want to get out of their comfort zone will just ignore it.