This is wonderful idea. Because lets be honest at lvl 61 you can't even grind effectively grind any of the end game spots. At most you can do is Hystria. Lvl 62 at Star's End makes the spot seem like a joke.

But again this is removing the real costumers content from the game. You!

And you create two types of players, protected ones and the others, which still have to share the same shots.

Ouch. 

"Some players will share, help and be kind.  And some will horde."

Get a grip on reality.  This is an online, video game.  A place designed for deviant behavior, trolls, and breaking all social norms.  Furthermore, Pearl Abyss designed it to be toxic and full of griefing.

In addition if only 5% of the player base is toxic, that's enough to spoil the entire game.  The other 19 players running quests, grinding in peace, sailing on their boat, they DON'T MATTER.  Not when you have a griefer trying to mob feed, knock you off a horse, block a path, etc.

Also getting back to the point, it's very important to be intolerable and brutal to these players trying to mob feed or steal grind locations.  Changing servers ONLY ENABLES bad behavior.  It rewards the bad behavior and makes that type of activity more worthwhile.  If you can just snag a prime spot by pking or mob feeding, it's highly productive.  If there is no consequence then why not just take someone's spot?  You think ethics, morals, or decency has anything to do with this.  Hell no, you can write off all toxic behavior as "it's just a game".

Also your suggestions do nothing to preventing this issue.  As the mobs get stronger, mob feeding just gets easier.  As the gear advances, the disparity advances.

I can mind my own business, be respectful, and not intefere with others.  Iv'e plenty plenty of other MMO's in the past with a more friendly environment, helped others, and enjoyed the content.

But if you think I'm going to let others players, Pearl Abyss, or anyone else take advantage of me......... I will destroy anyone that interferes with no mercy and no remorse.

These players sicken me, I am disgusted by them, and Pearl Abyss for creating and allowing this.  It's a pathetic shame they ruined the game experience for so many people who find these types of games as entertainment.  Their lack of understanding is a direct result of this games toxic environment.

At least unlike you and Pearl Abyss, New Worlds developers where able to get a glimpse of what actually happens when you produce such a disgusting game environment.  Their developers where shocked and appalled by the behavior of their community.  The SAME community.

I grind orcs with 61...? Lvl doesnt do much post lvl 60

That's because Pearl Abyss couldn't figure out how to capitlize on leveling and SP.  Probably also because of their plans to release new classes several times a year.

So they essentially gave no value to leveling.

why is mob feed a bad thing?

i can grind lets say starfall with 305 DP without taking dmg at all by just rotating my SA and FG skills
most skills are AOE and hit multiple targets so the more mobs the better

or do you mean mob feed by dragging in alot of mobs and than flag and cc?

this would be nasty ofc

but all the discussion regards pve server i truly dont understand why PA dosnt hand one out.. all olivia server are pve server so they know that pvp is a nasty thing that ruins the fun for players and this way they want to prevent rage quits from the game 
and olivia server work rly good i never had issues on them with to crowded spots and always could find my spot somewhere

"why is mob feed a bad thing?"

You are referring to low level areas.  Mob feeding today is generally done in the end games zones where some areas are even specifically designed to 1-2 shot nearly anyone.  In other locations you simply debuff your opponent and leave them with little health hoping the mobs will finish them off.  With a class like Zerker having so many grabs and being able to hold players in place, it's not that difficult.

In addition you abuse the completely busted game mechanics.  If your opponet is not flagged you can stand in their face and avoid every single attack and CC.  You ONLY begin the fight with a grab.  If you ever run into issues griefing you simply mash "V" or "ESC" and just abuse the game that way since it's complete garbage design.