Image sliders never felt safer Circa 2014 when Revolution Slider was penetrated by a Russian hacking group. The hack caused over 10,000 WordPress websites to be delisted from Google. Rule of thumb: Don’t use WordPress plugins or code that is “borrowed” as it can cause you problems down the road. Be original, keep original code, and try to minimize code as much as possible. The universe favors speed, and so do mobile website visitors.