The following code does not raise any warnings:

#[derive(Event)]
struct MyEvent;

fn main() {
    let mut app = App::new();
    App::init_resource::<Events<MyEvent>>(&mut app);
    App::run(&mut app);
}

This is likely because both lints match against just ExprKind::MethodCall, when they should also be looking for normal function calls.

Not sure if this bug will come up often, so this is probably low-priority.