What's so bad about treating a job that's inferior to your level with open contempt?

Earlier last year I took a job as my unemployment was running out that was a lot less favorable than other places in my field I'd ordinarily work, I warned them full well as I accepted their job that in better times I would have told them to take a hike and that I was only signing on because it was only for two months until they moved out of state where the rest of their operations were. My coworkers were of the same disposition, we all went for this company because all in all they were still paying marginally more than unemployment and again it wasn't forever. I would show up whenever I felt like it, take 45, 50 minute lunches as we were allotted 30 and although I did my work I didn't do it in any terrible rush nor did I put much mental effort on it. Sure enough we were all too damn good for them and that 2 months of work left to do was completed in one month and so we all were back in the No Job club a month ahead of schedule. I relate this to my friends and people I know; about half of them understood and the other half thought it was not nice of me to treat them like I did. I counter with that company was not all that fantastic and they all but begged us to treat them so. What do you think?