Drippers over fake scrapes are a great offensive tactic. Its a Dominant Bucks natural instinct to indentify each buck in the area so if he gets wiff of an unidentified Buck in the area it drives him crazy especially pre-rut. I've had Bucks lay as many as 10-15 rubs with-in 20yards of a dripper and some of them were very agressive rubs (you can tell the Buck pissed-off). I use "Wildelife research Mega Tarsal" and with great success. Keep in mind, all your hard work can be worthless if you leave any human scent.

FYI: on some drippers the tube is very small and if you hunt in a cold weather climant, depending on the scent they can freeze and crystalize and plug the tube up. Had this happen with "Hawgs" a few times.

CB