My logo rules:
1. Two or more logos worn (and visible) at a given time are only for members of said club.
2. Logos must be matching (cannot wear logo from one place and hat from another) UNLESS you are a member at both
3. Ball markers don't count--they may be adorned on one's person at any time irrespective of logo on hat, belt, or pants (magnetized or on holder)
4. Logo golf bags should be utilized by member or member's direct sibling. Special dispensation if logo has some personal affinity (Grandfather was a member, best friend gave you the bag and is a member and you broke your "gamer" bag, etc)
5. Logo jacket or windbreaker may be utilized at any time with other rules (not subject to above) not being in effect in times of emergency (weather); but may not be affixed as a staple.
6. One may not wear a logo of a course or club they have not played themselves. (i.e. I cannot buy a cypress point hat for someone that's never been there).
7. Headcovers may be utilized as a logo if: a.) They are not all matching, and is just an individual head cover; b.) they are old and tattered; and c.) extra points for headcovers from the british isles or Ireland.