I see more deceptive the fact that one need to trust the title is a good enough to give an insight of the link contents and do an extra click to reach the original content without even a small description. 

Might copy the whole contents is extreme too... 

supratic

He also used to avoid using link posts, even though he copies content from a link. We told him that this came across as deceptive and, therefore, in poor taste.

lightning

Research Update: A Geometric Approach for Optimal Channel Rebalancing

I agree with @0xbitcoiner.

He also used to avoid using link posts, even though he copies content from a link. We told him that this came across as deceptive and, therefore, in poor taste.

The same applies here.