With TAB - definitely not. They will welcome everyone - the more you bet the happier they are as they still get their cut out of every dollar you bet.

With Bookies - I know of several people who have been effectively banned by various sports bookmakers. Although their accounts weren't closed they had bet size limits placed on them that effectively stopped them betting - you can't make much money with a $20 limit on your bet size!

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"Computers can do that????" - Homer Simpson