Personally, I see this along the lines of: "
Are you the sort of loser who would thank someone for sex?" The
noder/chinger relationship is
symbiotic: he who pens a ching-worthy
write-up gets the "
brownie point factor" of a pat on the back and a job well done in the form of a tiny "
C!", and the chinger's life was enriched by either a filled gap of knowledge or a nugget of
nostalgia or whatever caused them to ching the writeup and disengage the
Cool Safety.
Unless, of course, you paid for the ching, then I guess it's perfectly all right to thank the person who gave it to you.
As a side note, I'm exactly the sort of loser who thanks people for sex, so I constantly send messages of appreciation to Those Who Ching Me. Well, except for P_I, because the only response I get out of him is a snide message saying "Please stop thanking me for cooling your writeup."