what punishments will befall him? And how much would he be charged?
This isn't a personal attack, but I hope that this wouldn't enter ANYBODY's mind if they were in a situation the felt was starting to get beyond their control. And sooner rather than later is definately the way forward. Pride can be a dangerous thing, and who's going to look dumber, a pilot calling 121.5 and letting it be known they aren't comfortable, or the guy who keeps it to him/herself and suddenly finds the big fan go very quiet. And I wouldn't think anybody would run out on to you on landing and bite your head off.
If as in you example, you were painting on radar, as Flower pointed out, there are multiple tricks that can be used. Even if you weren't painting but were in radio contact, many towers about the place have DF, which using your transmissions will indicate your direction from the airfield. D&D can also triangulate your position with their fancy kit.