Originally Posted by
Mont-Fleuri
I would not consider that as an option. In fact I find that quite irresponsible.
We can agree on this.
Do not overstay your visa. Rather, spend that same money (give or take) and do the quick trip to Aranya Prathet, for crossing into Cambodia, Mae Sai, for Myanmar, or south for Malaysia. There might also be other closer places for Myanmar. Yes it takes a day but you don't need to deal with immigration officials and potential future problems.
Better yet, get a tourist visa good for 60 days and don't worry about needing to do any of this.