Imo the punishment is warranted, you put the c4 down therefore you're responsible for it. However, the person that picked it up and held it in front of the crowd should also be punished if he wasn't already.

Imo the punishment is warranted, you put the c4 down therefore you're responsible for it. However, the person that picked it up and held it in front of the crowd should also be punished if he wasn't already.