The thread contains a question: "How much better to have an option of liking and disliking the forum as well as a comment section, to register our presence that we have read the topic and whether we liked it or not?"
ISC gives a nice opportunity of proper, active, verbal (written) communication and discussion in virtual face to face platform i.e. ISC forum section. It is far better than the inanimate symbolic or emoticon response.
By the current system of forum posts, one can respond and communicate one's agreement or disagreement about the topic, point out any deficiencies in language , style, grammar or lack of civility and decency. That will be the true way of giving one's response. And that is what is expected from ISC forum-ites, as the basic purpose of the site is to educate and enhance the visitor's knowledge and language.
ISC forum and the site as a whole is meant to encourage and give confidence to the contributors and NOT to hoot out them by discouraging remarks and indications. That is why ISC forum expects healthy discussion even when one does not concur with the initiator or other participants views.
If one can scan through the various testimonial ISC members have recorded in the testimonial sub-section as well in articles and other sections, we can see that members and contributors really welcome and expect such honest and correct observations and tips for improvement.
Moreover, ISC revenue is linked to the ad-clicks related to keywords and hence keywords and ,not just emoticons or symbols, are needed.
I hope, by proper observation and exploring the site more, one can differentiate ISC from other social media "thumb-up/down"' and make it a better habit to put our ideas improper words in proper context.
(P.S: I think you would like my this response though in disagreement to your suggestion, rather than my one word 'dislike' or thumbs down symbol. That would not have satisfied your curiosity why I disliked or disagreed. But this long response would satisfy you and may even prompt for more clarification and discussion. That is the aim of ISC forum)