It's a quote about slippery slopes that uses discrimination as an example. As is popular with that quote, we could adapt it into something a bit more applicable

It's a quote about slippery slopes that uses discrimination as an example. As is popular with that quote, we could adapt it into something a bit more applicable: They first made us run our shoes through the X-Ray machine, and I complied because it wasn't that big a deal. Then, they installed the full-body scanners, and I complied because I just wanted to get home for Christmas. Then, they started requiring social security numbers when buying plane tickets. Then, they began keeping all air travellers' fingerprints and retina scans on file... The question is not against whom they're discriminating (clearly, that's not applicable in this case), it's to what length they (and, by extension, we) are willing to go.