It has been noted in futurama that once you turn 160 you get taken away by the sunset squad, so if this is true then why hasn't Fry, Professor or Bender??
Fry is now 1024 years old, more than a tad over the limit, so surely him and all of the other deforstie should be taken away. Also Bender (his head) is 1004 years old, so why hasn't he been taken (that is assuming that the sunset squad applies to robots. The professor escaped from the near death star so why haven't they chased him up on this??
There is also the heads in jars, assuming then that celebrities can live forever as a head in a jar (except silvester stalone) it still doesn't explain why the sunset squad does such a lousy job!!