I have to admit I can be a sucker for it… and about half of the time it’s worth it.
I have a neighbor that loves to experiment with such things. His lamb burger with foie gras in the center was just ridiculously good… and probably cost around $5/burger to make. Some of the more extravagant offerings at Terry’s Turf Club in Cinci are well worth their price as well.
I guess for me if the pleasure you get from it is greater than from a regular burger and equal to the price, then I see no real reason to complain… as long as you don’t bring your expectations of what a burger is or should be with you to the table. I love a good plain ole burger, but I don’t see why it should necessarily be exempt from experimentation.