Hmm. Kai was incredibly tolerant of Zev when she was younger. She would launch herself at him quite aggressively, repeatedly, and he generally didn't do too much back to her. He could have quite easily clobbered her, but seemed to choose not to.
Now, maybe he's unusual, but I suspect there's something inbuilt in many mammals that have some degree of cooperative behaviour (and admittedly cats are not pack animals, but they do seem to have some sort of social structure) that encourages them not to be excessively aggressive towards the younger more stupid members of their species.
The chances are that he'll just work out newer and better ways to avoid them, rather than them working out how to chase him down. They're bound to be curious about him, because that's how they're wired up. Cats are naturally curious, as are the young of most species, so they've got double the trouble!
Anyway, keep the kitten pictures and videos coming.
