Thanks for all of the feedback! It sounds like blinds are worth a try with the terrible twosome. Leaving the blinds/shades up or the windows uncovered isn't really an option due to the amount of foot and vehicle traffic on our street.

I love seeing the kitties in the window when I come home. Auric will sit at the window nearest the driveway and yowl when he sees the car or bike! (Yep, he's our troublemaker.)