lot stories without the details to understand what really went wrong. It has nothing to do how many times, but pushing the limits or abusing the system. one year I entered 15 times visa exempt never had a single question. When one stays 30 days and then gets the 30 day extension and then leaves for 1-2 days and repeats that over and over again you will have problems
sorry to hear that but are you sure that they sent home because of only too many tourist visas. That sounds strange. Or was there something more too it