No, this isn't a complaint about things being out of control on the server.
Just wondering how insanely crazy they can personally modify the game if they wanted to
and how far they could go with customization.
There are a lot of things they can do, but there are limits too. Obviously the client/server is designed to be able to be modified for events and whatnot, but there are limitations.Suppose this was some sort of insane server where nothing made sense.
Or they just made a wacky event.
Can they eliminate Jobs? Turn them on or off for the whole server?
Not possible while people hold those jobs, certainly, but if they started over fresh, could they make it so say Merchant class jobs didn't exist?
They could probably remove all the NPCs that let you change to those jobs, but they can't just flip a switch to turn a job off. Not that they'd want to do that anyways, though.Could they make a Drops have 100,000,000 HP and spawn slaves like a boss?
Or do the inverse, turn Satan Morroc into a weakling that takes 50 damage?
Yes, they can make custom monsters (but I think they pretty much have to use the sprites built in to the server, as there are no sprite artists on the GM staff. I dunno if they can turn the monster drops into an MvP, mind you, but they can create an MvP with the same sprite and everything.Can they change the rates so that cards drop like apples and jellopies?
Can they makes it so that every monster only drops their card and candy?
I believe they can, since they can pretty much customize any part of the monster (for example, the easter bunny in the most recent event was very different from any monster you usually see: 100% chance to drop egg, nothing else. High def, low hp, tele skill, level 99.)What about changing which monsters have which sound effects when they die?
Would Stormy Knight be able to sound like a Spore when it dies?
I'm not so sure about this one, but I would imagine it's possible.Can they change the images that each monster uses? Recolor Desert Wolf so it's neon purple?
Most sprite changes would need a good sprite artist to be done, but changing color is fairly simple so yes, this could probably be done.And how about creating custom items?
See also: SQIs.Can they rename items, their attributes, and abilities?
Yes, although generally they try to stick to the original server as much as possible.Or even yet, create a whole new consumable, picture and all?
Yes, but once again new sprites are difficult so they'd be more likely to re-use a sprite for another item or use a sprite that's already in the server but for an item that isn't used yet.Do they have access to insert custom monsters?
Easter bunny 
A monster that doesn't exist on any other server on the planet?
...sort of. Like I said, they can customize all the factors built into the game, but the sprite they usually don't mess with since they don't have a sprite artist and in general, they try to stick to the original server I think.Like the Anthem Boss that'll only appear once a day on yadda yadda map at a random spawn time
that has 999,999,999 HP, the same in SP, teleportation powers, and a slew of spells that rivals gangs of High Wizards and Professors.
Yes, they could do that, but likely recycling the sprite of another monster. Dunno why they would do it, though, unless it were just for fun.With maybe Orc Kings as it's x10 Slave Spawn.
I'm not even sure what an Orc King is, but probably. If you mean Orc Lord, I'm not sure if MvP slaves can be other MvPs or not, but they probably could.Can they create their own custom Job class?
No they can't.Custom skills, weapons and whatnot associated with that class.
Nope.What exactly are the GMs limited to as far as server customization?
I'm not sure what the exact limitations are, just hang around and watch suggestions and you'll see what is or isn't possible 
