As a stand against the U.S. Federal Communications Commission’s proposal on net neutrality, a group of popular websites will stage an “Internet Slowdown” on Sept. 10. The plan is to overlay their sites with slow-to-load spinning icons. The point is to appeal to visitors to contact policymakers and complain about the notion of so-called “slow lanes” for delivering Web pages made by companies that don’t pay for fast service, a possible result of the current proposal. To be clear, the sites will not actually load more slowly, this is just a sort of symbolic protest in the tradition of the highly effective SOPA blackout campaign in 2012. But that little spinning icon likely has the power to evoke anxiety from Internet users who are all too familiar with it. Participants include Automattic, Cheezburger, Dwolla, Etsy, Foursquare, General Assembly, Kickstarter, Meetup, Mozilla, Namecheap, Reddit and Vimeo.