Agreed, although I personally believe that Goo Bombs are also not something we want to hand out, since being able to roll sealing instead of Taijutsu or weapons is probably really useful, especially if it's a powerful sealmaster's sealing. It makes it possible for genin to contribute meaningfully to battles against high level jonin, or even S rankers if the sealmaster is good enough (probably only S rank for us, since I doubt there's many other S rank sealmasters out there).
Anyway, do we know if Goo Bomb and Banshee seals get erased or destroyed or anything when used? Because otherwise we have to worry about people just picking up our discarded seals after or during a battle, and bringing them home to a sealmaster. One way to counter this is to pick up all used seals after a battle, or we could also attach them to training explosives that are set to go off about a second after the Banshee/Goo Bomb. This would also add a double whammy to Goo Bombs from the explosion.
