If you are being stopped getting into Thailand then you have no opportunity to get a 30 days extension to begin with since those can only be done from inside Thailand. I have no idea which article you are referring too.
One rectification: Safe Entry is the same as Fast Track and VIP services (if you use an agent). They are all the same but different agent use different terminology. I speak from experience, you end up in the same privilege line with the diplomat, pregnant women, handicap, children, and so on. But you skip that line as well no matter if an agent sold you a Safe Entry, Fast Track or VIP services. It's all about the same cost, and it's the same section of the airport.