FOUR bank robbers have been arrested after boasting about their successful raid on Facebook . The dim witted criminals posted the message Im rich and Wipe my teeth with hundreds soon after an armed raid on a bank in Houston, Texas. Police were tipped off about the postings on the social networking site and made four arrests. Two of those arrested worked for the Bank of Commerce in Houston where security video captured two armed and masked men robbing the bank and escaping with over 50,000. No one was hurt in the hold up, but police soon received a tip off about the boasting on Facebook . TG