Actually, they are remobilizing. A Twitter account, “Stop Rush,” which has been dormant since late 2010, woke up on Wednesday, when Mr. Limbaugh first called the student, Sandra Fluke, a “slut.” On Friday, as complaints from “Stop Rush” and others about Mr. Limbaugh’s comments mounted, a handful of companies said that they had halted their advertising on “The Rush Limbaugh Show,” at least temporarily. One of the companies, Quicken Loans, wrote on Twitter, “Due to continued inflammatory comments — along with valuable feedback from clients and team members — QL has suspended ads on Rush Limbaugh program.” Two mattress companies,...