If there are reasons to complain, _both_ H-1B holders and others are encouraged to complain. But just because some projects are staffed with H-1Bs, there is no indication of foul play. From the link you posted:

    Examples of H-1B fraud indicators may include:

    * The H-1B worker is not or will not be paid the wage certified on the
      Labor Condition Application (LCA).
    * There is a wage disparity between H-1B workers and other workers 
      performing the same or similar duties, particularly to the detriment 
      of U.S. workers.
    * The H-1B worker is not performing the duties specified in the H-1B 
      petition, including when the duties are at a higher level than the 
      position description.
    * The H-1B worker has less experience than U.S. workers in similar 
      positions in the same company.
    * The H-1B worker is not working in the intended location as certified 
      on the LCA.