Sorry if I misunderstood. My apologies. I was working from your initial post, and you wrote:
One time when I was greeting for Pluto by the Castle, there was a family who wasn't even in the line but wanted to take a picture of Pluto by himself. They actually tapped me on the shoulder and asked me to move!
Well, Pluto overheard what they said and basically, if I moved, he moved so they couldn't get a picture.
The fact that you put the "lmao" emoticon on the end of your message seemed to indicate that you thought Pluto was being awfully funny by countering your moves and not allowing the Guest to take a photo. So, I guess that's where I got that you were in on it. Sorry if I misunderstood. I know you have no control over what Pluto is doing, and that if Pluto decides to move every time you do, you can't exactly make him stop. But it didn't seem as though you were questioning Pluto's actions, but rather thinking they were funny. If the Guest was nice to you when they tapped you on the shoulder, or if Pluto wasn't with a Guest at the time the other Guest wanted a photo, then I still don't see what the big problem was.
Now, if Pluto was signing an autograph or posing for a photo at the time the other Guest told you to move, then that's a totally different thing, since the Guest is clearly disrupting the M&G. And if the Guest was rude to you when they asked you to move ... also a totally different thing.