I'm not sure they know what "liberals" are in that post.

Social liberalism, is a political philosophy and variety of liberalism that endorses social justice, social services, a mixed economy, and the expansion of civil and political rights, as slightly opposed to classical liberalism which favors limited government and an overall more laissez-faire style of governance.

Someone who wants to add move rules that the government has to implement is not a liberal. It's the opposite of expanding civil and political rights.