@Renato ********
is exactly the kind of Facebook guy who gets you in trouble with "trust me bro" immigration advice.
"Only 1–2 days" is not a visa rule. There is NO grace period. Many people got lucky before and now think their luck is law.
Thai law is simple: if you surrender at the office/airport/border, you pay the 500 baht/day fine. If you get caught first, the arrest table applies. That table says even one day leads to a 5 YEAR BAN. Read it now.
It's pure gambling for people that don't plan ahead, or worse: you thought you were above it all and invent your own rules. No country lets you do that. Offenders get caught, but they pay the price in silence.
You never hear their stories on Facebook because people would just laugh and call them a fool. This group can't help you with a 5 year blacklist. Believe what you want, but respect Thai law. You are a guest.
Don't become an example of a bad tourist.