Do I need to worry about marinade dripping in a gas grill? I bought a marinated flank steak that I’ll be grilling on a gas grill. When I purchased it, the butcher suggested I use aluminum foil while grilling it to avoid the marinade potentially causing huge flames as it drips. 

When I researched this later, I found articles saying it’s dangerous to use foil while grilling. 

Do I actually need to worry about fire or giant flames when grilling a marinated steak? If so, what can I use instead of foil?
Yah aluminum foil is considered a bad thing on grills, from what I have heard.

They sell grill grates for such things if you like, me, I just turn the flame on the grill down a touch and deal with the occasional flame-ups. They actually do no harm. And if you have a grill brush to apply the marinade while cooking with a l o n g handle (what I use) you can keep your hands farther away from the (potential) flame.

Anyway a little bit of char from the flame is a good thing and adds flavor to the meat!