my rule was started tongue-in-cheek, but when counter-challenged, I argued from a reasonable standpoint.
starting with the assertion people will do almost anything to catch a buzz, repeatedly, if it's a pleasant experience. which will lead to commercialization; if it tastes good and gets you high, and it's not illegal to do so, someone will package and sell it.
and DfH Rosabi supports THAT PART of my argument. not all of it. just that part there, where I quoted myself.
it also supports another part of my argument where a perfunctory search of "wasabi beer" would have yielded plenty of information.