@Tom ********

This is factually incorrect. Thai immigration does not care one bit about overstay.

@Heidi ****

Any Cambodian border not named Poi Pet is very easy to leave from and enter Thailand.

@Chom *****

There is no such thing as spending the night to increase your odds. I live 45 min from Nong Khai border, you can leave and come back 15 min later no problem.

@Jonathan *************************

The 2 visa exempt land entry has been there for 6-7 years approx? OP is talking about recent toughness at the border which is not a thing. And what you are describing with illegal work is unrelated to entering by land, it's a different subject which, yes, it's harder to work illegally unless you do it online.

@Paweł *****

Exactly!

It's a common myth that border run is getting more difficult in Thailand. What is more difficult is entering from an airport (especially BKK and Phuket), but the borders are really easy to enter from with no issue.

You don't need to worry about 1 day overstay. You won't be charged 500 baht for a 1 day overstay in Suvarnabhumi Airport. And the overstay stamp is no big deal. Those who think an overstay stamp can be a problem are clueless. In the list of all potential reason to be denied a visa or entry in Thailand, overstay stamp is very far down the list.

@Maryam ***

There no such thing as "kids on overstay". Under 15 years old you can stay in Thailand without any issue.

@Sam *******

I've been out of Canada for over 10 years, no problem.

The fountain of all visa related knowledge is Tod Daniels, but to answer your question, the myth of denial due to overstay is an old foreigner myth that they use to fear monger and patronize younger people. It's not a thing.