Red Rick
Bionic Poster
Federer can and will use dumb tactics when he feels like it.You're missing it, any player including Federer will try to lock Delpo on his BH side. Fed even today didn't mind staying on BH side, he only changed tactics after he was outgunned at topspin vs topspin exchanges, he basically almost quit BH topspin and went slicing.
It's how he lost to Del Potro the last time.