Unfortunately because communities have abused these programs a valuable tool is being lost. When FHWA instituted the red-light running campaign it was to reduce the number of fatalities due to running red lights. Red-light running is now the biggest generator of fatalities and it's an increasingly serious problem. I support the program because it's intent is to reduce accidents, but the problem is the states and companies involved have completely abused the intent.
Reducing yellow time is contrary to every design guideline there is. In fact I'd wager that were you in an accident as a result of reduced yellow times you could win substantial lawsuits against the city and company involved. In fact I'd actively encourage people to sue cities, counties, muni's and states that reduce yellow time to drive up revenue.
Unfortunately because the systems been so heavily abused I don't think cameras will be a useable tool in the future, which is unfortunate.