Everything you ever write is protected by copyright unless you explicitly place it in the public domain, which is effectively what By-Tor has done.
Search engines that cache your copyright do so under fair use, which doesn't infringe your rights.
Yes, that means you cannot repost my pictures without my permission - although I allow anything I do to be used for non-commercial purposes as long as it's attributed. One can, in fact, post a picture on the internet and then sue someone for reposting it elsewhere, without needing to state that they cannot do so.
Don't assume posting on the internet is the same as relinquishing your rights.