Many people are guilty of this! I guess you should stop it after reading this and please tell others about it...
A few days ago, a guy was charging his mobile phone at home. Just at that time a call came in and he answered it with the charging Instrument still connected to the outlet.
Shortly electricity flowed into the cell phone unrestrained (maybe there was current fluctuation) and the young man was thrown to the floor with a heavy thud. As you can see, the phone actually exploded.