So because of a little dispute locally, you equate their shoppers (of which I am one) with fleas?
That's cool. I was with you with Walmart, but not with Costco.
I'm fairly certain what you blame on Costco is not unique to Costco. It is an aspect of modern life with houses sprawled everywhere. Hell, cities and states do this. Grocery stores do this.
I request an un-biased source showing that Costco is the greatest abuser of eminent domain. Because only government can claim eminent domain. So if they took property, they did it with the local government's blessing.
We have a street that desperately needs widened, but that would mean about 10 families displaced. They know something needs to be done, but their alternative is to reduce the number of lanes and add a turn lane (currently narrow 4 lanes, no divider). Their solution is thus to reduce and restrict traffic in an already heavy corridor for traffic.
Property disputes are ugly. No lie. But the greater good usually prevails; local property owners may get the boot (and sometimes a bad deal), but the greater populace almost always benefits. It's an ugly aspect of governing and coded use of land, a necessary evil if you will.