Clearwater, Florida — The Church of Scientology is launching a TV ad campaign in Tampa Bay this week. But the controversial group, which is based in Clearwater, insists the ads are not connected to recent news stories that slam the church and its powerful leader. The ad push will target multiple channels, but very particular time slots. The goal’s to catch the eyes of anyone watching TV at that moment, even if they flip the channel. Turn to another station, and you’ll catch the same ad there, too. It’s a technique from advertising agencies’ playbooks called a “roadblock”.