@AnaisOfSpace
Understanding your Problem all to well as several have been through this. The problem with stalkers is there is really nothing you can do. 1. You have your room locator off 2. you place yourself on DND to show offline. ( Mind you if someone is using the Next app on thier phone they can still see you as being online even though you are DND so to solve that you have to mark yourself offline on Both if you use both.) 3. If in a public room that you frequent alot you have set a pattern for your stalker to follow, change it up. Also ask the room Mods or Owner if they wouldn't mind Blocking your stalker as you enjoy utilizing and visiting their rooms.
Now just because a stalker somes into a public room where you are do not stop talking as you want to talk to bait the person to respond to you in a negative way. Mind you do not say anything directly to them to get yourself set up. But wait for them to say something negative about you and then Flag it. Make sure you flag all instances with this person to be able to present to IMVU a pattern. Also, If you have friends in the room and you have VIP and able to whisper ask them at the same time as well to flag the conversation. Then File a ticket or utilize Help Live Chat if you are VIP. Take for granted IMVU does not really do anything to stop such offenses but offer warnings to the person you will not know what happens to the other. I known some to acquire over 50 warnings (handslaps) and are still on IMVU.
You mentioned that they say they know you in real life and have your real life information the best bet then as it is a intrusion of your Real life you can call your local Police Department and ask for the Cyber Division. Report what is going on there and for their records make sure you have copies of the chats as well as Snapshots of the instances where they have mentioned they know about your real life. Threats are a very serious thing and should be dealt with immediately. Do not listen to others and take oh they are just playing with your head as some are not as such and are something of a serious nature.
There is also the suggestion if you have a Alternative Avatar to play on that for a while and give the other person time to chill out and lose interest in bothering you and move onto the next person. I know this does not solve anything and it is very frustrating to you as it is to alot of others that go through this daily. Usually ignoring the person they will see that they are not getting to you anymore and will also leave you alone. Sometimes people make their ownselves the target and this is done by making comments to them or others that they are bothering you and as long as they know that they will keep coming at you because this is how they get their so called High.
Another solution may be to create a alt and well turn about is fair play. Use your alt to stalk them. Turn your fear and harassment into something fun for you let them see how it feels. Just make sure you don't break any of IMVUs TOS's and you will be fine. I believe another suggested this as well to create a alt exactly looking like theirs and their identical name with maybe 2 of the letters switched so it looks the same and show up where they are. Turn your pain into your Fun.
Now If they continue I am sure there are a few mafia members here that would love to have some fun chasing them around and making them feel what it is to be stalked.
I hope this helps you feel a little better hun don't let it eat at you as there are a lot of crazies on IMVU and IMVU really does not care as long as they get their money but do as they require and keep doing no matter if it's a 100 times a day.
Smile and Keep your Chin up hun.
ES