They are just shit ESL jobs, who cares if someone uses a fake/forged degree, whatever.

The pay is shit, ESL is not for young people. For the semi-retired older men it may have been ok in the past to work two or three days a week at a university in China.

As for Thailand, the problem is that degrees are in fact verified and checked very carefully there, and penalties for using a fake degree can be up to several months in prison and large fines. Some USA teachers were in fact jailed in Bangkok for several months a few years back.

Teachers should not use fake documents in Thailand, the penalty is very severe. I for one think it's ok for people to use fake degrees to get an ESL job.

It is not a moral or ethical issue.