faultfinding; critical of trivial flaws; designed to entrap
Dictionary.com entry for Captious
Thorin N. Tatge & NerdFury are so captious as to criticize anything one posts ;-)
Online Etymology Dictionary entry for Captious
c.1408, from M.Fr. captieux, from L. captiosus, from captio "a deceiving, fallacious argument," lit. "a taking (in)," from capere "to take, catch" (see capable).