I most certainly would, given the chance. And that's not the same thing, you won't find any of Reagan's family at a republican convention.
To be honest, I didn't want to bring it up, since I wasn't there, but from what I heard, your booth sounds far more offensive to me than these t-shirts. Using someone's death to make a statement about something you don't like and feel they wouldn't like is one thing. I don't find it any more offensive than saying "so and so would be rolling over in their grave at this." But setting up a booth to sell merchandise with their face and seemingly nothing else, using a funeral to draw people to your booth, selling t-shirts and magazines and doing everything you can to put your brand name next to a dead man's face offends me. And just because it's sentimental and not shocking doesn't make it any better.
But that's your choice, you don't think it's wrong to do, and it's your right. The 4e Killed Gary shirts play to the same audience, they just use shock over sentiment.