Let's say you are on 20K max. overstay (let's say you have overstayed for 6 months or so).
Assuming you leave at the airport and pay the fine will you then be restricted from coming back to Thailand for a certain period?
Could you, for example, pay the fine then head to a nearby Thai embassy and get a Tourist Visa and re-enter in the next few days or weeks? Anyone know anybody that has done this (recently)?