Something interesting to think about is we live on a G-sequence star so detecting life mostly in G and K stars won't take much argument WRT G. However one inte

Something interesting to think about is we live on a G-sequence star so detecting life mostly in G and K stars won't take much argument WRT G. However one interesting idea WRT K series, is as a dwarf, I bet a "nearby" sufficiently bored, yet paranoid, civilization could mess with a K series by periodically blasting it remotely with a truly huge laser/maser and mirror system. I'm not talking about bored ham radio operator level of commitment but a suitably high tech advanced civilization could possibly pull this off. "Well, we're building a solar system wide asteroid defense system anyway, so letting the scientists do research 1% of the time when nothing else is going on, won't hurt too much" So possibly the G series civilizations are rather psychologically optimistic, or pessimistic about physics anyway, and K series stars are reflected/enhanced light from a troll civilization located within 500 light years or something. Perhaps the K series stars are reflectors for a nearby G series civilization. In that case maybe the ratio of G/K reflects some kind of galactic intelligence level of average paranoia. Or for that matter vice versa. Perhaps we're the odd men out and most galactic civilizations are K series and find it hilarious to "frame" innocent G series stars. I suppose extremely detailed planet searches will be performed on these interesting stars, regardless of natural or SETI cause the results are likely worthwhile.