I don't give references out for men that abuse the system.

Such as;
Late arrivals and not giving a courtesy call to inform,
Not following safety directions,
Haggling,
Wasting time by calling and not setting appointment,
Playing games,
Pulling off condom when I'm not looking,
Setting appointment and cancelling at last minute,
These measures also eliminates the man from using me as a reference once he f*cks up his chances.
I am not enabling his actions.
There are plenty of companions taking this approach, maybe a few hobbyist will learn to act accordingly.
Have a Happy New Year Baby