Hello Pooh, and welcome to the DIS and to VMK!
I am CL_DaraSue in game.
"Taken," "Bay Be," "Mummy," etc. are all ploys to form some sort of "relationship" on VMK. They are not a good idea, and can quickly get out of hand.
Best to stand clear of all of that, stay out of those rooms or places where it is happening. As has been said, if someone directly asks you, tell them, "I don't do taken" and leave the area. If you see it going on around you, leave the area.
You will form some of the best friends you can imagine on VMK all without labeling any of it. Play the mini-games, find people from here to help you with quests, that kind of stuff. You will find friends from other friends, etc. Don't feel pressured to do anything that makes you uncomfortable, whether it is "taken" or "give me free stuff and I'll be your friend". Always remember that you are in control of your avatar! Simply walk away.
Have fun exploring our wonderful little piece of Disney. And if you ever need any help with anything, please send me a private message here. If I am on the game, I will help you. If I am at work and cannot get on the game, I can find someone to help you.