Very interesting post, Dr Adequate! Obviously "cause and effect" is fundamental to scientific knowledge. When regarded as a "Law", however, it appears to be mostly used in the context of the paranormal or at least theosophy.
To try it yourself, Google for: "cause and effect" "scientific". You should get a bunch of science-related sites that refer to scientific method, data analysis, etc.
Now Google for: "law of cause and effect" "scientific". You should get a bunch of sites related to religion and the paranormal.
If you Google for just "law of cause and effect" you should be hitting almost nothing but paranormal-related sites.
I added the word "scientific" to the search parameters because I hypothesized that it would cause the effect of finding sites that refer to "scientific method". It was, therefore, somewhat surprising that adding "law of" with the same parameters virtually eliminated scientific sites.
I believe, but do not know, that this is what Dr Adequate was demonstrating by this posting thread. That is, Dr Adequate believed that posting this thread would cause the effect of this community understanding that references to "cause and effect" as a "law" tend to indicate an attribute of non-scientific reasoning. I suspect that the effect was not fully realized. Perhaps Dr Adequate should undertake further study of the law of cause and effect, or possibly align his Qi with his chakras.