The last days in Chaiya but also in Phun Phin I had attacks which exceeded those in Malaysia by far. I would label some of them them as dangerous.
The people who manage the guesthouse Udomlap in Chaiya are suspicious to me to be in supporting such attacks. It does not make sense to start investigations as I assume they are in MC and so know in advance.
I suspect in Chaiya also others. You can be sure to get their Thai smile when you meet them.
As you see many Thais like to harass foreigners. Would you like to come to Thailand for a holiday? Thai guesthouse holder especially like to harass foreigners or support it.