I for one don't agree, although I don't feel very strongly about it.

IMHO, "thank you" nodes are a waste. (But I wouldn't down-vote a node just for that.) If someone feels the need to issue thanks (and I'm certainly not against that), they could add an Update to their previous node in the thread.

Of course, if they have more info to add, such as, "O.k, that worked; thanks. Now it's doing this odd thing...", then a new node is fully justified.

All IMHO, of course. (But that goes without saying. (And that should go without saying... ;-))