@Todd ********
According official sources you can even get banned for 1 day when caught.
"From 20th March 2016, if you are caught overstaying by even one day, you will face a ban from re-entering Thailand of five years. If you have overstayed by more than one year, you will face a ban of ten years."
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7/?locale=th_TH
When you don't believe that is up to you of course.