Yakman, when you say "our user page" and "our own home page", what comes into my mind is our profile pages.
In your case, this would be: http://photosynth.net/userprofilepage.aspx?user=Yakman
In my case, this would be: http://photosynth.net/userprofilepage.aspx?user=Nathanael
In fact, no one's synths and panos appear on those pages, except our own.
This isn't meant to be an argument against your request, but I think that you would be more clearly understood if you asked for there to be no other 'Related Photosynths' on our photosynths' and panoramas' view pages.
In response to your suggestion, though, surely you've noticed that on YouTube the related videos on the right hand side of the video being watched are only related by subject matter and not often anything uploaded by the same person. This can also be true on Flickr, when a photo has been added to a group which holds many different people's photos on the same subject, so it's not unusual.