Also, any effects we may have on arthropod selective evolution by randomly killing visible spiders is going to be vastly overshadowed by the very rapid and immediate changes we’re making to the environment broadly.

We would need somewhere between centuries or millennia of very predictable and consistent behavior killing visible spiders before we saw any change to their overall behavior, meanwhile we’ve all but destroyed the ecosystem at their scale anyway, which is going to have vastly more dramatic impact on populations and evolution, assuming they survive at all.

When was the last time any of you remember getting your windows covered with bugs after a summer drive?