> Slippery slope is a falacy, just like "correlation proves causation", to pick one HN somehow likes.

I've seen too many "if this happens then that will be next" come true to write every use off just because your 9th grade teacher said it was fallacious. For instance the U.S. legal system leans very heavily on the concept of "precedent". Slippery slopes are baked into the system.

I don't think you can just pull out the fallacy card every time it comes up and declare anyone who is predicting a chain of events to be arguing in bad faith.