If little things like that annoy you, you're probably on the wrong site ;-)
I discovered ages ago that the probability of getting any sort of acknowledgement for a post is inversely proportional to the effort put into that post.
For example, if I simply post a link to a website (which took me 10 seconds to Google), I'll get 3 stars and a message of thanks. If I give up a night's sleep, to spend ten hours researching a question, I can guarantee that the questioner won't bother to respond.
At least you (indirectly) received an acknowledgement that your post had been read. Just remember that plagiarism of your answers means that someone thinks they're worth copying ;-)
Chris