No, entirely incorrect. "bad thing can happen, so it will happen" is essentially a mangling of Murphy's Law.

In a slippery slope argument, a course of action is rejected [eg: this minor law] because the slippery slope advocate believes it will lead to a chain reaction resulting in an undesirable end or ends [eg: loose claims of a pot getting hotter implying further details will be demanded next].

https://en.wikipedia.org/wiki/Slippery_slope