I don't think it was intended as a slippery-slope argument, but rather as a demonstration that the proposed method was inherently indiscriminate.
In other words, it amounts to "stop doing things I don't like", and doesn't take into account the reasonableness (or lack thereof) of the person taking offense.
In other words, it amounts to "stop doing things I don't like", and doesn't take into account the reasonableness (or lack thereof) of the person taking offense.