The thing is most normal merchants do not care about Lazlo and what happened back then, some do not even know about it. This is a significant event for people who know about Bitcoin and it is also a bit of an embarrassment and bad publicity if you buy something with bitcoins now and the amount that you would have received for that amount of bitcoins skyrocket in the future.

People would be very hesitant to use their coins if they know what happened with Lazlo and that is the exact opposite of what merchants want to promote.