" 
 :Oh, buggerit! And I'd been working on something to say to him.  Like ""ignorant"" = you don't know what a listed building is, so try clicking on that blue link (it tells you it's notable); and ""American"" = you live in America (that's apparently xenophobic!!).  Actually, I haven't, I've been continuing to contribute to an encyclopaedia, rather than ruining others people's (good?) work.   "