Yes, teams have issued an intentional walk. I don't know how it turned out.
The guy on 2nd thing is VERY statistically effective in shortening the game, and that's all it's designed to do. We're looking for little strategies to gain an advantage, but it's all about who's coming up to bat.
The Fangraphs podcast I listen to, Effectively Wild, pondered that with the additional roster spot, do you want to have a pinch-runner player for that 10th inning. It might make sense, and yes, you remove your big hitter on 2nd BECAUSE the situation is designed so that his batting spot doesn't come back around again. The game will be over 99%+ of the time.