The "only" information they have is valuable to the one who was so kind to take his time helping me.
I disagree. They often also indicate which of many replies the OP found most useful/helpful/correct. Which is often just as perl related as the questions.
Do you feel disturbed by these "Thank-you-nodes"?
No. I'm happy to see them, for others replies; happy to receive them for my own replies; and happy to post them for good replies to my own questions.
With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.