 In the mid @-@ 2000s , German sect experts expressed concerns that Scientologists were becoming active in the German after @-@ school <unk> market . These concerns arose because customers of around 20 after @-@ school <unk> centres operated by Scientologists in Frankfurt , Hamburg , <unk> and elsewhere might be unaware that their children were being taught by Scientologists , using Scientology methods . <unk> advertising the <unk> services would at most mention the name of L. Ron Hubbard , the founder of Scientology , but not Scientology itself . 
