How would switching work in a "real life" battle? I can see turns as both players giving their commands at the same time and then the pokemon attack each other, I think it works like this in the anime as well (it's been a while since I last saw it.)

So how does switching in work? Mechanically it's obviously so you can't just switch around all you want, there needs to be a limit. But why would I throw my pokeball into the enemy's next attack? Since your opponent can't see that you're switching pokemon until the turn starts (after they've issued their order), I take that to mean you're recalling your pokemon at the last second to avoid the attack. In that case, why wouldn't you throw it somewhere else, away from your opponent's pokemon instead of right into them?
Does this come up in the anime or anything? Are people just straight up attacking the pokeballs? surely there would be some sort of rules against that sort of thing, it seems unsporting