Everyone wants to belong to something.
Let them be on your TEAM!
Your "team" can be your staff, clients, customers, patients, or community. Anyone who identifies with you and loves your brand, and wants to show they are a part of it - so let them!
Logo items can be a waste of money or they can provide a HUGE boost for your brand and bottom line! They allow people to learn about you and feel connected with your brand - it is part of building the relationship. As with any item that has your logo - the item and logo must be consistent with your brand or your business personality.