Probably been suggested elsewhere, but I think every time we hear the narrator on Ancient Aliens say "...as ancient alien theorists believe..." we should take a sip of our favorite beverage.
"...as ancient alien researchers" counts too. So does "...as ancient alien researchers/theorists contend...", "...as ancient alien researchers/theorists theorize..." etc.
By the way, I love Ancient Aliens. I commented after last night's episode that even if you took away all the stretchable moments -- meaning, those "theories" that really, seem to be a huge stretch for support of the ancient alien theory, even for me -- and discarded those theories you disagree with (I don't agree with everything they propose) you're still left with an excellent case for the Ancient Alien theory to be valid.