Naughty: every tourist who sends his three-year-old over to "stand by the cuddly bear so I can take your picture."

Nice: Andy Niekamp, who heads up the Dayton Hikers group and did, hands down, the most effective job of leading a beginner's backpacking trip that I've ever seen - and then, on the follow-up trip, was kind enough to do all the planning so I could just relax, follow, and rediscover the total joy I get from walking and sleeping in the woods for a couple of days. (I was an assistant leader on both trips - but thanks to his excellent planning, organization, and execution, there wasn't a lot of assisting needed.)