I can tell you there is zero risk of fine even you do nothing, just travel minimum every 6 month.
And if you want to have tm30 you can register online with the information what should be attached to the rental contract or you go to immigration office with passport and tell them you are back same address again. Nothing to fill out.
My landlord died 3 years ago and I made a new contract with his son but still register friends when they coming to Thailand online under the old name.
All the people with dtv visa are new in Thailand and don't have a clue and complain about everything. In Thailand you do not act by logic you adapt and solve problems by finding a way what suits you.
Nobody at the airport is interested in tm30 or 90 days report, not true they collecting fines. If you have dtv you normally never have to interact with imigration so you would never pay a fine
what you are talking are you drunk? There is no work permit for online work as it is not illegal. You say you have a dtv visa so you working also illegal by your own definition as its just a stupid tourist visa
you don't have any clue about Thai laws, when you work for a foreign company remotely nothing is illegal and no government can even issue a work permit for it. Stop spreading lies
there is no case when you work remote that you break the law. It's just a lie. Co-working spaces would be illegal like casinos and get raided any day. The dtv is just a multi entry tourist visa for 6 month stay. It is not a work permit. So don't spread lies