If the want to automate such things, then they should be providing you with evidence of your vehicle passing any tolls in order that you can pay a correct amount, and doing so in a sensible timescale of passing the toll.

And as with the above article....anyone falsely accused and harassed should be entitled to compensation due to their sheer incompetence....and if it's found to be deliberate, criminal charges should be brought against those issuing the tolls.