Two pages of thread on grilling, and not a single mention of brats??? WTHH???

Anyone parboil them before grilling?? I've had buddies fire up brats in a cast iron skillet with beer and onions while the grill is heating. The grill is only for putting grill marks on the brat. And, yeah....the accompaniment is stone-ground mustard with a little sauerkraut with caraway. And a Crown Royal Regal Apple Mule.