Kinda glad these guys are extinct!
If they were here among us, my undies would sort them out quick style. No worries.
I don't know. Every once in a while I'll take out one of my old books of prehistoric animals and think of how cool it would be to see one of these beasts in the living flesh.
I mean we keep lions, elephants, certain species of sharks, crocodiles and other large animals in zoos. Whose to say if they didn't go extinct, we wouldn't have a deinsuchous or a mastodon on display some where.