Abstract
Education on the use of social networking services (SNS) has been traditionally conducted in schools. However, there have been incessant cases where videos of nuisance behavior are posted and spread on SNS, becoming a major social issue. In this study, we conducted a survey on the awareness of SNS use among university students. As a result, it was shown that there were significantly more students who answered that they have things to be careful about on private accounts (so-called “locked accounts”) than on regular accounts. In recent years, nuisance behavior videos have become a social issue. These videos are often spread by followers who record the screen of their smartphones and repost them on their regular SNS accounts after they are posted on private accounts. However, only 56.3% of university students are aware of this situation. Furthermore, the strong sense of security towards private accounts suggests the need for appropriate implementation of teaching materials and education that show various information leakage routes even in private accounts.