Its funny, these guys don't get too crazy. From simple dots to using the golf ball stencil we all get from the local golf shop.
Tin cup makes great products (not affiliated) may have "to borrower" that design for my initials as well.
One black dot and one red dot above the brand name.All the balls that I carry with me are marked before leaving home.If I must play a provisional ,I will make sure it is a different number than the original or put a dot under the brand.
I like to put red dots on mine in the shape of a capital S. Helps when I'm playing in a group.
I mark my TP5 with a blacked out E on both sides of Taylormade the I put a line through TP5 on side of ball. I mark the ball with either red or black sharpy