I've seen lots of exos in the tower with serving jobs like being a post person, cleaning, or being a guide.
I feel like this is the proper role for all exos as I don't think they are very adept in combat.
Whenever I see exos in the crucible I feel like I should destroy their ghost as well so I can dismantle the exo and use their parts to upgrade my weapons.
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Eh... considering I play what is essentially a SpaceGhost, I don't have problems with the Exo players. Besides, in the fields we all have helmets on. We are all guardians. Nobody really cares so long as we all live, get to shoot stuff, and get loot for doing it.