I have not. I like to keep it up in the water as much as possible. I used to use a small bullet weight but got hung up alot on the front edge of it on the pads. So now its the frog only and no weight.
I put 2 of those TruTungsten Force Beads in front of frogs and have been for a while... it makes a popping noise as you jerk it along... but I usually only do that when I put a bullet sinker about 18" above the hook... I keep my froggs skimming right under the water... no lily pads for me to contend with.
I have been in front of a Ribbit Frog and 3:16 No Bull Frogs. I don't know if it makes a difference in terms of bait durability or not, but it can't hurt.
I have used the smallest brass worm weight I can find and a glass bead to make a popping sound as well. Works well as long as there is not much stringy vegatation.