Ah. I see now. You wish to replicate Janet Reno's strategy against firearms ownership: if you harrass enough people, then they will surrender their guns more readily.
Empowering government to engage in pure harrassment is a pretty stupid idea, OK?
Thus, even if your juries that must be out there somewhere (I trust you have evidence other than your bare assertion) do not convict, it is not the case that nothing has been accomplished.
Look in newspapers from 1987-88. Most probably would not devote extensive coverage to cases ending in acquittal, but there ought to be a column-inch or so reporting the fact.