I used to go see a Zeppelin Tribute band play at different bars around town when I was 14 yo, they were great. I have no problems seeing tribute bands as long as they do the songs justice. I've tried to get a couple of tribute bands going myself in the past but it's not easy finding others on the same page and level. I have a few favourite bands that I wouldn't mind playing their songs exclusively. It would be more fun to do 4 sets as four different tributes. The tribute thing doesn't surprise me, most musicians are the biggest fans of whatever band or artist influenced them and made them take up their instruments in the first place.