I have publicly ranted about the rudeness of "no reply means no."
I have stated publicly that I answer all my email queries (the real ones.)
I intend to keep my part of that social contract with you the query letter writer.
Your part of the deal is you do NOT send me other stuff.
No pictures of cute animals.
No pleas about missing children.
It doesn't take too many people to create a problem. It's time for writers to add this to the list of things they make sure their friends, critique groups and writers' message boards know.