Police confiscated three cars for allegedly doing burnouts on Cambridge Rd at the wake of Te Awamutu man Kyle Ross, 21.
Waikato western response manager Senior Sergeant David Raffan said police were at Wednesday's wake after numerous reports from the public.
Ross died in a car crash last week.
The first vehicle impounded was that a passing motorist who saw the crowd and burnout marks and allegedly decided to join in.
AdvertisementAdvertise with NZME.
Raffan said police impounded two more vehicles overnight as the result of information they had received.
He said photos and video footage of the allegedly illegal behaviour taken by the public would be invaluable. It could be emailed to police or dropped into the Te Awamutu station.
People should call 111 if life is in danger or call *555 from their mobile phone to report road incidents.