Surprised you lasted this long on exemptions. They're gonna turn you around soon. I bounced by air to Jakarta and got pulled over at Don Mueng, they just hammered me verbally and said next time I better have a visa when I come into the country and that was only the 2nd bounce of that trip to Thailand, although for 7 years I had always done exemptions, extensions, and 1 or 2 border bounces each time I came for 6-8 month stays.
Friend of mine got turned around in phuket, sent back to Malaysia to get a tourist visa.