@electronicmail,
Yes, everybody else can see the thread except the person who thumbed it down. It's a kind of personal housekeeping effort.
I have a couple of questions. One is that I remember some time ago there was either a practice or consideration of a future practice, of Questions being deleted from time to time in a another kind of general housekeeping by the board administrators. I don't know if this is true, but if so, would be one more difference between Questions and Discussions.
The other is about the filters on the preference page. My understanding is fuzzy - I am under the impression that my No answer to Topic and Post Filters shields me from having others thumb downs - in whatever massive accumulation - affecting what I see. BFN's explanation confused me, in relation to that effect.
Meantime, great job, Butrflynet. Very cool.