Cant remove Start,parameter variable in activity log

We have personal data being passed into the VXML application and do not want it printed in the activity logs.   The data is being shown in the start,parameter lines of the log.    When I adjust the ActivityLogConfig file to prohibit this data from being written, it does not acknowledge the removal of 'start' and prints that information anyway.  I must have some logs printed, so turning off logging altogether is not an option, and printing this sensitive data in the log is also not an option.  Any bug fix or work around for this?

Thanks so much!

Unfortunately, this is not an option.