Hi Stevenyc, and thanks.
We know that Jehovah has called out of the nations a people for His name (Acts 15:14).
There are many ways to bring reproach against His name, but as far as one person doing that, you bring up a good point. Can one person bring reproach against the Creator of all things' name? In a simple answer, yes. If a person is carrying that name as a registered, card carrying, full fledged, dedicated, baptized follower and imitator of Jesus Christ, then responsibility comes with that baptism to do whatever possible to remain chaste in conduct.
Upholding fine moral standards is not only commendable, it is required upon baptism as commanded by Christ (Matthew 28:19, 20). Even the demons recognized Christ's holiness (clean morality) in association with his Father, and therefore his followers must also be holy:
(Mark 1:24) . . .Did you come to destroy us? I know exactly who you are, the Holy One of God.. . .
(Leviticus 11:44) For I am Jehovah YOUR God; and YOU must sanctify yourselves and YOU must prove yourselves holy, because I am holy. So YOU must not make YOUR souls unclean by any swarming creature that moves upon the earth.
(Leviticus 19:2) "Speak to the entire assembly of the sons of Israel, and you must say to them, ‘YOU should prove yourselves holy, because I Jehovah YOUR God am holy.
(Leviticus 20:26) And YOU must prove yourselves holy to me, because I Jehovah am holy; and I am proceeding to divide YOU off from the peoples to become mine.
(Deuteronomy 23:14) For Jehovah your God is walking about within your camp to deliver you and to abandon your enemies to you; and your camp must prove to be holy, that he may see nothing indecent in you and certainly turn away from accompanying you.