we have a guy at our hub that has worked there for about a year now. he worked in the unload for about 6 months and now he's working in the preload. he's a good worker. he works fast and does a good job. but the problem is, he's a scab and he doesn't know the concept of teamwork. he only looks out for himself and doesn't even talk to anyone. he wont even say "hi" or "good morning". what should we do?