I believe when you are in church you are on holy ground.
I think we should avoid the appearance of evil.
Where do you draw the line?
If one is "born again" one is a new creature, a new person.
If one looks like a hooker, a pimp, or what have you, there is something wrong.
Of course we don't need to go into extremes, it all takes common sense.
Not wantig to upset some people here, but this is my 2 cents.