Appreciated the topic - be kind, comment ...

I often notice that people comment on topics without appreciating them ...
Or vice versa - the topic is appreciated, but the comment did not leave ...

For many, including for me, these actions remain mysterious. For what they put a minus to the topic, it is not clear? And sometimes in karma they pound without explanation.

I understand that the question is subtle, but it can also be solved diplomatically.
')
First, evaluate the topic, and then read the comments, sort the comments and have the opportunity to comment yourself ...

Or differently - I appreciated the topic, kindly comment. Otherwise, a fine from a UFO.

In the meantime, it turns out a complete anonymity of action, unleashing the hands of not quite conscientious readers.