I'd argue otherwise. When people notice that others like what they've posted, levels of the "happy chemical" also known as "dopamine" tend to increase and people feel happy and part of a community when they notice that others have responded favourably to their posts. I don't think it's right to punish people for liking other people's ideas and posts. I'd suppose that this is why people share their thoughts in the first place, namely, to see how people will react or to start discussions on pertinent issues.