What should I do about my expired tourist visa in Thailand and the overstayed stamp?

The user is currently on a tourist visa that expired last month, resulting in a daily fine for overstay. They are seeking advice on the repercussions of their situation and whether they can simply pay the fine at the border when leaving the country. Various community members suggest options such as going to an immigration office to pay the overstay fine and apply for an extension instead of repeating a visa run, which could complicate their situation. There is consensus on the need to resolve the overstay issue as soon as possible to avoid further complications and fines.