Stop protecting the foreigner by blaming the Thai man with the boat. Stop excuse his action with the lame and already overused "he is doing like Thais". If this man was fishing a type of fish, that is protected in the area he was fishing, then he has broken the law. If so, then he is rightfully sought for according to the laws, rules and regulations Thailand.
What his punishment should be? That is hard to say. Deportation is to harsh, as he might not have been aware of that it was illegal fishing in the area he was doing it. However, it is a persons responsibility to have the knowledge enough to be aware of their situation and where they are. Actually, if in a national park, all hunting and fishing will be unlawful. Something that everyone have the knowledge about.
I also di not know what posts about the Red Bull guy or calling in the FBI has to do with things. IMO it´s good to hear that they do enforce laws at least in some cases. This time it happened to be a foreigner, and then this forum is on fire blaming all they can on Thais and roaring about how terrible it is to enforce the law.
Wonder if it would be the same reaction if it would have been a Thai posting a picture like that on Facebook. (But, now on the other hand, all members in the forum is going to say that it would not have been news in that case). The reality is, that it would have been. That, as the stupidity in all this is to post picture and brag about it online.