What caused GP to raise the question, and why I mention the effect's name, is that secondhand smoke also affects the smoker themselves. So the total effect is always going to be worse for the smoker than the people around them - they get both the filtered and unfiltered smoke.

However, your link is going for the consent angle - that the people around the smoker are being terribly affected by something they didn't choose. Note it also specifically states "nonsmokers who are exposed to secondhand smoke", not generally that secondhand smoke is worse. What's frustrating is that their reference is a dead link that redirects to an unrelated article, that doesn't include what's supposedly sourced from it, so it's hard to tell what their baseline for "25 to 30 percent greater risk" is, but I'm guessing it's nonsmokers with no exposure at all.

That said, I also remember seeing some claims that the filters actually make it worse than commonly believed, that particles or fibers break off of the filters and damage the lungs directly.