I must remember how one of the colleagues handled that interpersonal drama thing. For the first time someone asks him something (say that regex question), he ha

I must remember how one of the colleagues handled that interpersonal drama thing. For the first time someone asks him something (say that regex question), he happily answers and shows why the answer is what it is. But if someone asks him that same question for the second time couple of days later, he says "that'll be $5". In just a couple of weeks number of people who comes to him for the second time drastically reduced :)