It is better, surely, to get the universal input to your logbook habit as soon as possible.
My problems started when some bright spark noticed I was was logging a block time of less than the time put in the dep/arr slot. Reason? Dep. time was engine start, arr. time engine shutdown - for my own reasons. Despite it being obvious that I was not diddling the system, shiny arsed bureacrat decided investigations involving receipts, invoices and confirmations from operators and headaches all round were required.
Pissed off? I'll say!