[T-Bone Texan]

Many of these dogs will "alert" when they know the handler wants them to alert

This is absolutely true, and renders the entire argument moot.

These dogs merely give the cops an excuse to do whatever they want, which is trample our rights. Some of these dogs have a failure rate higher than 50% ! How is that even possible?

It is patently unconstitutional, and an example of the police state

[envisio]

Many of these dogs will "alert" when they know the handler wants them to alert

Or the officer will say they alerted when the dog did not.
I saw an officer during security training that said the dog alerted. The suspect said "No he did not. I watched him. He did not do any such thing". The suspect was right, the dog did not alert but the cop said "oh yeah, he alerted, we can search now."

[envisio]

And by the way... the dogs will alert on Immoduim AD or any other such over the counter drug.

[longtermmemmory]

reminds me of the USSC overturning the police using infrared cameras to look INSIDE homes on whim.