I’ve seen this too. Not only on that category, I’ve given a solution to one’s post and they replied along the lines of “I fixed the issue, thank you!” and mark their reply solutioned. First off, that’s spam and creating clutter. Secondly, that’s not an answer, what if other people have that issue, do they just depend on your solution of, “thanks, I fixed it.” … no!!
For discussions, I am no longer seeing any contributive (it’s a word now) responses from newer members. Members are clearly not seeing the point of this forum: a professional one. I feel that if I give a long response on a discussion, people upvote other ones that aren’t even related to development.