If this regime started to slaughter innocent protesters on the street, it would be broadcast globally.
That would destroy this governments credibility.
The reason they are still in power is because of the lethargy of the people.
And how to do it, you ask?
Social media...
Organise a day and the whole nation descends on Bangkok.
Or if that's too risky there is another option that they can't do anything about.
Organise a sit-in/down.
Every day the whole nation stops working for a period of time.
Every establishment, company, business, factory.
How long do you think the oh-so important foreign companies like the auto industry would put up with that.
Prawit & Co would be powerless to do anything.