unlawful detention,false arrest, seizure of property, attack on your freedom to protest, harassment of political demonstrators, intimidation, brutal physical assaults, dishonesty, corruption, collusion with arms and vivisection corporations, failure to enforce the fox hunt ban, misuse of the terrorism act, PACE, stop and seach, fixed penalty notices, misuse of bylaws, failure to investigate complaints, etc, etc...
why not fill out the survey here
http://www.sussexpoliceauthority.gov.uk/survey_0708/index.asp
what harm could it do?