Log data changes for infotype

Hi,

When creating an infotype with transaction PPCI, we notice that for the generated tables (in the technical settings) the flag 'Log data changes' is set (apparently for table infotypes in the HRT-table, for field infotypes in the HRP-table).

Does anyone know why this is done? And can this be avoided?

This gives us a lot of update logging records (in DBTABLOG) that we don't need.

What is the consequence of unsetting this flag?

Thanks for helping.

Kris