You make a lot of blanket assertions without any supporting explanation, not to mention evidence! If you just like to "heat things up", that makes you an internet troll. Internet trolls are despicable. Is it your objective to be despicable?

Both dark matter and dark energy are falsifiable, as the BA has clarified. But there are indeed some popular (scientific?) speculations whose falsifiability is not readily apparent. As previously mentioned, the idea of "parallel universes" would not seem to be falsifiable, since we can never detect anything outside of our own universe. As Gell-Mann points out, "even if such theoretical speculations are shown to be without foundation, the notion of multiple, largely independent universes still provides a nice (if rather abstract) way of thinking about probabilities in quantum cosmology." The "parallel universe" idea probably derives from Hugh Everett's "many worlds" hypothesis, which Gell-Mann indicates is largely misunderstood. The idea is that there are not actually many universes, but the idea of "alternative histories of the universe" is useful in quantum theory. In depth discussion on this is found in Gell-Mann's The Quark and the Jaguar.

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Everyone is entitled to his own opinion, but not his own facts.