I found this story in which I found cute.
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Ghost Fragment - Exotic Weapons
Gunsmith: Alright, Guardian, after weeks of hard work and dedication, as well as accomplishing strike after strike successfully, and making a serious dent in the enemies' war machines, command has awarded you with your hard earned Exotic shotgun, "Universal Remote".
Guardian: Awesome! I have been really grinding away to get this! Now I'll just sling this baby over my back and show those Darkness foes who's boss!
Gunsmith: Whoa, tiger. Hold on a second. You already have "Patience and Time" in your hands!
Guardian: So? That's for long range, and this one's for up- close!
Gunsmith: You can't equip both of those, though.
Guardian: What? Why not? They don't affect my "light" in any way, and honestly, neither one of them is all that powerful. In fact, my legendary is just as powerful as these, so it's not like I'll become over powered or anything. Having two exotics changes nothing, besides after all of the long and repetitive work I had to do to get this gun, I think I've earned the right to carry two of them..
Gunsmith: Doesn't matter. You cannot equip two exotics.
Guardian: Why not??
Gunsmith: Insurance.
Guardian: What?
Gunsmith: Insurance. See, ever since the collapse, premiums have been through the roof. I mean, you do NOT want to see the premiums on keeping this place running, what with all the rampant lawsuits.
Guardian: Lawsuits???
Gunsmith: Oh yeah. Tons of 'em. You know how many Guardians ask to be resurrected by Ghosts?
Guardian: No.
Gunsmith: None of them. They're dead, and therefore have no way of making the choice for themselves. That leads everyone down the slippery slope of litigation. It's happened so often that the Speaker is under orders to not explain anything to anyone. Before the lawsuits, you couldn't get the Speaker to shut up, but now? Silence because there are so many cases pending against the Tower for wrongful resurrection.
Guardian: Wrongful Resurrection??
Gunsmith: Well, did you ask to be brought back from the dead?
Guardian: Well, no, but I..
Gunsmith: And once you were brought back from the dead has anyone ever given you good explanation as to why?
Guardian: My Ghost said something about a Darkness or..
Gunsmith: Exactly. You got 3Bed.
Guardian: 3Bed??
Gunsmith: Brought Back & Bamboozled. See, Ghosts just meander around poking at corpses and robbing graves looking for meat to throw into the grinder. You ever wonder why the Guardians are all resurrections? Because no one alive wants the job.
Guardian: Now that you mention it, I have been wondering about that. What about you? Are you a Guardian too?
Gunsmith: Hell no! I'm not some idiot zombie warmonger. I like living, hence why I stay here in the Tower where it's safe and I can make some glimmer for myself. You? You're a zombie and as such, you have no choice. You have to fight. Anyhow, a lot of you Zombies have started looking into and started lawsuits against the Tower for wrongful resurrection, which leaves us with the higher insurance premiums in order to make up for the legal costs. The Cryptarchs also help out by making certain nothing truly expensive ever leaves their hands.... such as Exotic weapons, which in turn means....
Guardian: I can't equip two exotic weapons.
Gunsmith: Correct!
Guardian: This is idiotic.
Gunsmith: Yep, it sure is, but you only have yourself to blame.
Guardian: Me?? Why?
Gunsmith: Zombie Lawsuits... and with how much I have to pay to insure this shop against the Zombie Uprising, I'll be damned if I'm going to see a Zombie waltzing around the tower with two exotics. Now if you'll excuse me, the Gyro I ate for lunch has run its course and I need to put one in The Dark Below.
Moral of the story: Please let us equip multiple exotic weapons, at least for PVE.
P.S. -- And I've decided to start the Zombie Uprising clan, inspired from this story. The group is open to any and all systems, and its all about being casual, having fun and just running amok with the tag "Zombie Uprising" under our names, and really.. who doesn't want that?
Here's a link to the clan. Join the Zombie Uprising if you want... or don't