So guys i dont know if you have experienced this while playing but whats wrong with some people?
For example many people mount their grand expedition yak and stay in place for 20 mins but when i go near to use the transmog npc they will move or despawn the npcs so i cant use them, ITS HAPPENING A LOT, why are they doing this?
It happened so much to me that i got so mad i bought my own grand expedition yak.
Have you experienced that behavior and why do you think they are doing this?
It could be accidental. Im using the mount alot and if i see someone using my transmog npc i will wait a bit for the player to mog.
It surery sometimes happen accidentally but i am talking about really on purpose most of the time, like they dont like having their mount used by someone else
It did happen to me aswell but whatever i got my own yak now 
Yeah i got mine because of this and i let everyone use it for hours.
Truth be told I summon my G.E.Yak only long enough for me to use it. Which is plenty of time, cause I sure take my sweet time.
I doubt there’s anything deliberately malicious going on - the player is probably just finished whatever they’re doing and has no idea someone else is using the mount’s vendors. Unless someone asks me to get out the mount to use, I pay no attention to what anyone else is doing. If you want uninterrupted access, you can ask, go to the transmog guy in cities or (as you chose to) buy your own.
Last thing on my mind when I use any vendor mount is “oh god let’s play the sucker with this rando”. 95% of the cases I am using it for my own needs, the other 5% if someone has requested it.
There is no benefit of doubt to the cases i mention, i had people many times doint it clearly on purpose, one got as far as to despawn the npcs when i went near him and he just sat there on his grand expedition yak without the vendors…
That is just… weird behaviour! I’d like to assume that the majority of people wouldn’t do things like this to be mean on purpose… Mind you, I wouldn’t be surprised if someone people with the AH mount do deliberately stop others from using it since it costs so much and they may feel that others are taking advantage!
Its truly a weird behavior and it clearly shows really bad and problematic attitude.
Might have something to do with the money they paid to use a service that is free for you to use.
Truth is i always liked the idea that your vendor mount gives you the money people spend on it but since this isnt happening i dont get why they care if i use it or not.
I bought the yak, easy fix.
Same but i spent all the money i ever made haha.
I once had someone whisper me asking me stop using their mount and to get my own. I only wanted to update the appearance of my new shoes ;-;
I now have my own yak. Worth 120k to not deal with those people again!
I do this with my AH mount. It’s hilarious to see people running after you and telling them to buy their own. 
Afterall, i bought it for myself with my gold
h.ttps://i.gifer.com/BVdF.mp4
That’s really mean. 
Myself I often dismount the yak when someone comes close, because it’s so big and might be in the way.
I know, its sad 
Now that i got mine i go afk on it but not near npcs so all can use it and noone gets annoyed.