I live in what used to be rural Georgia. That is until Publix, Kroger & Ingles and Eckerd's, CVS & Walgreen's and Sam's, Costco & B.J.'s and K-Mart, Target & Wal-Mart and... (well the list goes on) moved in. I hate it every time I see land destroyed because someone, somewhere, thought that somehow we all need more than 3 almost identical stores within 2 miles of our front doors. I, too, own vehicles and live in a house.
I also know that bullfrogs are a non-native species, they were introduced. This is not evolution, but more an environmental change which could destroy the native frogs that are supposed to (because of evolution) live around my house. I don't want to be too exclusive because there are tons of toads, newts, salamanders, anoles, snakes, birds, bats, squirrels, chipmunks, etc... that I also don't want eaten by a bullfrog. And all of these animals are eaten by bullfrogs.
I also know that many frogs can be cannibalistic. As long as one native frogs (that belongs in my yard due to evolution) eats another native frog (that also belongs in my yard...) I see that as nature and I'm OK with it... because it's supposed to work that way.
It's not that I don't understand bullfrogs, I just don't much like them. I would never do anything to harm one, but I do see them as being almost as destructive to the native frog population as the devistating environmental changes I see daily.
By the way, just because the bullfrog can "push out" other frogs (after all they'll eat anything that fits in their mouths) their survival cannot be compared to human evolution.