Please see the following GitHub issue. The team would appreciate your thoughts both there and here
julianlam created this issue in NodeBB/NodeBB
Re-design paginator to include top/bottom buttons?
Whoever it is, it's not us... as @pitaj suggests it could be bots issuing HEAD requests to determine site availability before crawling? Who knows... I am looking at some of them coming in our logging system now, but they have no user agent either, so