This ticket refers to http://feedback.arma3.com/view.php?id=1768

The refereed ticket was closed marking the stated issue as feature (which is fine)

but since a normal soldier can't disarm his own bombs, i would consider tweaking the UI somehow so players can not accidentally arm a bomb carrying in their inventory.

an idea would be to move the action somehow from the action menu to the inventory.. so the player has open his inventory, select the explosive and interact with it inside the inventory.

i'm afraid of using the action menu while carrying explosives, especially when the explosive is mission critical.