I was browsing a Stack Exchange site where I am not a member - so I was browsing anonymously. I found an interesting question, read it, and then wanted to do further research. I checked out the right side panel and noticed some "Linked" questions.
I clicked on one and started to read it, only to realize that it was the question I had just read! I clicked again in the right panel and again the same question! Okay I was a little slow but eventually I realized that the linked question must be a duplicate of the current one.
So my feature request: If I don't have enough reputation to read the duplicate, don't show me the question link in the right hand panel. I should note that I did see the same link under both the "Linked" questions as well as "Related" questions.
The current behavior may be confusing for users who don't realize what is happening.
For the troubleshooters:
Question I was reading: Can Ubuntu run on a Microsoft Surface with Windows RT?