For all bookies:
Top 10 sure signs of a professional player:
10. Bets dogs and unders mostly
9. Insists on calling you "sir", even though he's the customer
8. Takes the opposite of wagerline consensus 90% of the time
7. Changes his password once a month and has at least one character like "#" in it
6. Complains about rounding to 2 decimal places when the true price is an infinite decimal
5. Enters contests you sponsor on Rx and has one of those "brainiac" avatars
4. Mentions his current rollover status along with his ID in emails to Cx
3. Beats your linesman to the move 60% of the time
2. Says "what babe?" when you ask him how he likes the babe on your homepage
And the number one dead giveaway sure sign of a professional gambler is....
Drum roll please...
1. Asks for year-end statement