Fake monks in Phuket BUT how do you spot them

image from the Phuket Gazette - permission requested
In the Phuket Gazette recently there was an article regarding the fact that there have been a spate of fake monks who have been travelling in Phuket and collecting alms from people.

“The penalty for impersonating a monk is a 3,000 baht or up to three months imprisonment,” 

How do you know that they are fake?

1) The monk is collecting after 8am.
2) Generally the Thai people do not pay them any attention
3) They ask for money.

Obviously this is not always consistent...