Dave flight hours

Dave has flown:

Hyperion N909JE 2009: 3.4 hours
2010: 48.9 hours
JEGE N908JE 2009: 2.2 hours
2010 : 0.8 hours

I have never spoken to Dave about recording passenger names in his personal log book,,,) believe he continues to do this practice, please advise if you think it is appropriate for me to have a conversation with him regarding this? thx