I think it is important that fans get some respect and, yes, some autographs from Red Sox players. Personally, I'd be shocked if Papelbon and Lester didn't sign hundreds, maybe thousands of balls every year.
Seeing a few kids not get what they dreamed for is unfortunate, but I don't think it represents the intention of Lester or Papelbon as people.
Hell, this was a big series for this team and a serious and stressful time for their season--on a tough roadtrip, after some hard losses, behind in the standings, trade deadline day, etc.,. As a sox fan I'm just glad the deadline has passed and they're back to within .5 games. That's how I would spin it to any kid who feels entitled to an autograph. Try going to spring training with some new baseballs or just trying at a lot more games, you'll get autographs.
Welcome to the site though.