Nobody will do anything because the kind of people who are annoyed by this kind of behavior are generally well off and religiously law abiding. The kind of people who would do something a) aren't that bothered by it and b) generally have bigger thorns in their sides than someone else's loud car
This is fundamentally a conflict of class based social norms. The kind of people who have obnoxiously loud cars don't have a lot of the kind of people who complain about obnoxiously loud cars in their social circles.
They might notice the low oil light warning. If they immediately shut off their engine, the engine will probably be just fine. Modern oil "sticks" to the moving parts much better, so it takes a day or two for it to all drip down into the sump.
Gas tank donations are one common approach, as is helping aesthetics by removing those unsightly air valves on tires.