[tathagatadg]

That's the smartest part of the hack I guess - that the waiter actually invested time to test out his idea! Who knows probably the first marker he picked up didn't work the way he expected and he moved on to the next one till he found what worked.

[user24]

It's more likely he doesn't give a monkeys about degrading the LCD display and the first whiteboard pen he found worked fine.

[tathagatadg]

:D ... guess you are right!