Perhaps no one who reads this blog has any problem with pastors wearing collars (even outside the Divine Service!). However, I know that some people do have various issues with the collar; for example, I have a good friend who does not see the reason for it.
Why do I wear one now, on vicarage, and why will I wear one when I am a pastor? Simply because it is a uniform that identifies the wearer as one of God’s called and ordained servants (or a servant-in-training). Ideally, it signifies one who speaks God’s Word, celebrates the Sacraments of Christ, and preaches forgiveness of sins to sinners.
I say “ideally” because there are those who have worn or who do wear the collar who do not deserve to. Those who have grossly abused their position of authority, or who have caused little ones to stumble and fall, or those whom God has not called give a bad name to all who have been, by the grace of God, faithful in their callings.
These exceptions do not invalidate the use of the collar; do we ignore all policemen because of some bad cops? Do we stop going to any and all doctors because some have committed malpractice? Are all soldiers evil because some have brought shame to their countries? All of these wear uniforms and they do not stop wearing their uniforms because of those who have misused their uniforms.
Finally, a question: why all the colors? Black is the color of the uniform (although, possibly, I could see the use of liturgical colors during certain seasons of the Church Year). They are not a fashion statement. Especially wrong is any shirt that could be called “Hawaiian”!
I realize that clerical shirts and collars are adiaphora. They are neither prescribed or prohibited by God in His Word. However, they are useful in practice; perhaps those who read this blog who are currently pastors would be willing to share how their collars opened them to conversations they would not have had otherwise.