Yeah, I saw that. But as I said, if there was one or two cases where a forum user congratulated another with a screenshot of a nice achievement, that would be okay. But when most of the posts you find are made by other forum members, this is not okay. If you check those posts, you clearly have a feeling that they were waiting to catch someone to hit a good number so they can take a screenshot and congratulate them and get some merit at the end. I don't think established forum members do that. If you closely, most of them are below hero members. I guess you understand what I am talking about. Of course this is not a rules violation of this thread.
In the end, it is up to each of us - readers of this topic, to evaluate whether or not the capture is adequate for what is proposed. The simple fact that they take screenshots of the entire screen clearly shows that what is proposed was not understood. Then they will not receive rewards.
The best way to discourage this type of behavior is to "ignore" it and not reward it.