Do you say Thank You?

Always, I consider it rude not to.

Maybe sometimes they didn't receive it in the first place. Or they didn't want to bother you. Or maybe they didn't like your advice. Or maybe they are just jerks.

I have replied to questions sent via email sometimes.
I do not expect a thank-you.
I AM, however, in person a cold, cruel, indifferent to the plight of humanity.. nasty bitch... and thus wouldn't worry about being polite.

I agree, it's inconsiderate. I always send a thankyou reply, and as far as I recall have received thanks from all of those who have contacted me.

I find a similar phenomena in forum threads, though not often. A person will post a new thread to which there are responses, but the original poster doesn't acknowledge the responses with a thankyou, what they did with the info, and if it worked. Threads are more useful to the whole community if there is closure.

I find either of two extreemes: either people are incredible helpful and professional or they respond with very few words. Like many I'm sure, I have developed a very nice "e-mail relationship" with several members here and weekly/monthly chats about this great hobby who want to take the time to be curteous. Members in the other bucket I try to not let bother me. But overall, yes, I believe what you are expecting, Tvad, is correct.