Is there a block/ignore feature? I have this fan/stalker who likes to send me obscene messages whenever I log in. What do I do? I just want it to stop.

Unfortunately, there doesn't seem to be either of those two features at the moment. If telling the opposite party to cease their actions doesn't work I would say send in a request with CyberStep contact (https://www.cyberstep.com/help/mailform) forms and try to get administrative help solving this issue.
(agitating the stalker/fan by saying you'll report them is not a good idea, attempting to probe around with the other person to see why they're doing this could be a double-edge sword-it could end very well or very bad-, ignoring would be a good option but isn't entirely fool-proof, be careful not to leave the situation unresolved though as there may be a chance the situation escalates if the fan does not contact you his obsession may increase because of it)

Make sure you take screenshots (f12) as evidence so that CyberStep has a case to work with.

This might also be a good time to take a break from your main and maybe chill around by making an alt and meeting some new people. I hope you receive the help you need because this sounds like it is becoming an obsessive case.

Danameless if you wanted me to stop whispering to you, you could of told me...you JERK. I thought we were friends

You did many nice things for me and I didnt want to make it look like i didnt care about you I just wanted to be friends

Im just saying, if someone thinks im bothering them, let me know so i would stop. I didnt know i was really bothering him i thought he was AFK all the time. And all i was doing was asking questions and help

This is exactly why im on the help and support forum

Hey np. I'm glad you random people could make friends on my thread. I'm glad that the thread actually got used for something. You guys have fun now.