The name of the game is having fun. If people find it fun operating shades, and other people find it fun countering them, let them do it. Especially when there's one country rolling a map, enjoying 2:1 numbers advantage, and still operating a shade. At that point, why not bring out a shade and see what kind of wrench you can throw in their works. Heck, this week I saw Cybro drop field sups in a town we were about to take. Not that I think that works (resupping an enemy town), but the effort to try and wrench things up was inspiring.