I think a visual warning on the dashboard is a necessary indication and would imagine that the insurers would also, it is a basic 1st line deterrent.

My previous 4/4 Sport 2009 led was dangling behind the dashboard so it is taking a while to modify the looms.

2009 4/4 Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Connaught Green +8 prev