IMHO, the meaning of the word "poaching" has been corrupted to the point where it encompasses any game violation and hence when someone says a "poacher" was caught you have no idea what specific law he violated. Now if we go by the dictionary definition which is basically tresspassing for the purpose of taking fish and/or game then I say it's a pretty serious offense and pending the specifics could be criminal. If the offense is some triviality like not properly displaying your back tag then no, just a simple violation.