A scientific theory is not so shaky as could be implied by the colloquial usage of the word 'theory'.
The common usage would be closer to 'conjecture' or perhaps 'hypothesis' which is to say a falsifiable conjecture. Cell theory, germ theory, evolutionary theory, quantum theory, and the theory of plate tectonics are all certainly neither mere conjecture nor hypothesis.
To say "...all of your thought..." might be a bit hasty, and give me too much credit for rigor. Some of what I say here isn't based on any scientific theory, but only my personal fancies such as "...I'm given to thinking that there are likely other slimy patches out there somewhere..." for instance.
In fact much of what I say here seems to me to have little to do with the theory of evolution, strictly speaking. I make no mention of heritable traits, mutation, selective pressure, or other such central concepts to evolutionary theory. I tend to speak relatively strictly however. Perhaps you are not doing so here and that's absolutely fine by me.
If 'dangerous' can be taken to mean 'uncertain' I definitely recognize the underlying uncertainty. Though if we're going to assume that there exists some objective external world to study outside of perception that acts in ways humans could apprehend, among other pills I find impossibly hard to swallow, I can stomach the comparatively slight uncertainty of evolutionary theory on top of all that.
Nonetheless, I find myself a bit puzzled as to why you would invoke evolutionary theory here and extol it's dangers. Particularly I find 'dangerous' vague in this usage. Care to elaborate?
RE: UFO's anyone?