"The Kingston Trio were to be elected to say The Rock and Roll Hall of Fame for example, the three imposters get to go up and claim the award, right?"

The question doesn't apply, but I get your point. I could be wrong, but I believe all members of a group that is inducted share in the honor. I believe all of the ex-Supremes shared in the honor, except for the diva who did not show up.

I'm not disagreeing with you that there are too many "tribute" bands who rip off the name, but you are not doing a service to those groups that do try to respect the original sound and tradition. I believe the Kingston Trio did that. They may not have the chops that they once did, but I think they have a right to do so. People do not have to attend a concert or purchase a CD of a group they do not like or care for.