How to highlight "risky" action by its icon, and make it stand out from other icons?

By the icon look and its position/relation to other icons in a row, I want to give the impression of risky action. 

I added a little line that visually separates the icon from the rest (reversible, low-impact actions). Icons have tooltips, and on clicking, a modal window opens, so the user has still time to cancel their decision. But I want to give a more "please think twice before clicking" flavor to it or make it stand out from the rest.