I would "care" about them, but I often end up having to kill them so they stop driving my warthogs straight into the enemy wraiths/banshees/army. If they did more good than harm, I'd probably try to protect them.
In the modern world, "common sense" is an oxymoron.
This is true i think they have infinite health though not sure on that but it looked like it at times.
Nah. They've got super powerful health/shields and are effected by Tilt just like everything else, but they'll die under concentrated fire. Eventually. For that, I will save them from the things that can kill them every time I can. The regular troops have been on their own ever since I got the achievement for making sure they survive that one mission.
Those who criticize our generation forget who raised it.