When I was in undergraduate, I never knew anybody who was the least bit competent in their work that did this. If I [or my friends who were similar minded] were on a project team for a class (biggest memory being senior design), we made sure that the kids with this mentality had the least responsibility.
Don't believe me? A colleague and I refused to sign a paper that said our "team leader" did sufficient work that would count for professional experience (because he neither got an internship nor summer research). He had to go to fellow slackers to get his signatures. Ha! Too bad he graduated.