Hello,
Sorry for dwelling on a "spammy" topic. If you are NOT interested in this then please accept my regret and let me assure you that this is NOT to add to the existing spam. If you still are unconvinced, then the only thing I can tell you is "sorry, accept my apologies for wasting your time and please stop reading further."
Okay, here is what I thought of it.
Yesterday I sent a mail as a response to a spam from LinkedIn to the cafe. I don't know how, but part of my mail text was missing. (I must have pressed Ctrl-C instead of Ctrl-V to paste the text from another file.)
I had thought of an idea which I call "upstream spam filter".
Anyway here is the text:
I thought, some people here on the list, who might have links with the higher-ups at linked-in might bring the issue to their notice and would make them *register* the Haskell-Cafe list on their server so that they never send a spam to the entire list. They should install such an "upstream spam filter". This "upstream spam filter" based solution would be more effective in culling spam as compared to solutions based on requesting/heckling individual linked-in subscribers to take some action at his/her end. Note that here the individual may or may not be doing intentional spamming BUT the linkedin is *hiding* behind the subscribers' ignorance.
I propose that more *influential* people on the list demand that the linked-in company should provide a way to register some emails (e.g. mailing lists) which they SHOULD spare from their spamming machines.