A Scout is trustworthy. A Scout tells the truth. He is honest, and he keeps his promises. People can depend on him.
The first of the twelve points of the Scout Law sets a high bar for scouts. Being helpful, friendly, or courteous are simple, easily described behaviors compared to being trustworthy. Being "Worthy of Trust" means a promise made is a promise fulfilled. It means a scout will do what he says he will do. It means the scout will see things through to the end.
A Scourt is trustworthy not because he is forced to be that way, but because he chooses to be. His honor is the only regulation that enforces his trustworthiness. That is why the words, "On My Honor", are so important to a Scout - his honor is the only collateral he has to offer to ensure that he can be trusted. If a Scout has no sense of honor, then the Scout Law and the Scout Oath lose their meaning and strength.
BYOP and tweezers might be needed.