From Thai PBS World

Thailand’s Ministry of Health is working with the Ministry of Tourism and Sports to prepare guidelines to allow visitors from Thailand’s neighbouring countries, such as Laos, Myanmar and Malaysia, to take one-day trips to Thailand as the country prepares to reopen to tourism on November 1^st.

Today (Tuesday), Deputy Public Health Minister Sathit Pitutecha said discussions are being held and plans are being drawn up to allow tourists to travel over the Malaysian border into Hat Yai in Thailand’s southern province of Songkhla, and tourists from Laos to travel to the north-eastern province of Nong Khai. Tourists crossing the Thai-Myanmar border will be able to visit Tak province.

He also explained the preparations for the reopening of Thailand on November 1^st, saying foreign arrivals must:

1. Be arriving from a low-risk country on Thailand’s approved list.
2. Be fully inoculated with a minimum of two doses of a recognised vaccine
3. Have negative results from a RT-PCR test taken no more than 72 hours prior to the trip
4. Take another RT-PCR test within 24 hours of arrival in Thailand
5. Have a minimum of US$50,000 health insurance coverage while in Thailand
6. Have written or electronic confirmation of hotel bookings 

https://www.thaipbsworld.com/thailand-aims-to-draw-neighbours-for-one-day-trips/

I wouldnt but i guess some would definitely do lol of course no one would if they need to quarantine when coming back to their country (malaysia still impose 7 days at home warranty for fully vaccinated)