Yes , grey zone is always illegal . I just wanted to share him that there is a grey zone in Thailand for work . Like prostitution , its a grey zone and I think the whole Thailand is a grey zone actually .
Its strange how every consulate have different rules.
I wish they not do that restriction every where...And anyway , in my opinion rules are important but a lot of foreigner here are teacher and spend there salary in the country. Blocking there acces will be an education waste and economicly too.