If you own up at border exit, you will cop a 20,000 baht fine and a 5 year ban. If they catch you before you get there, it’s a 20,000 fine, deportation and at least a 10 year ban - you will be jailed for the duration during this process.
i asked at Immigration today and that is what I was told. I know TiT and all that, and different IOs can be variable on some points, but the IO's I spoke to were very clear - it is basically just TVs applied for from outside the country.