HISTCONTROL=ignorespace
 unset RANDOM
 RANDOM=4
 clear
...

If RANDOM is unset, it loses its special properties, even if it is subsequently reset.

HISTCONTROL If the list of values includes ignorespace, lines which begin with a space character are not saved in the history list.

RTFM can save your server AND your bet ;-)

it is cheating of course if the predefined rules tell us about such requirements and if these are not met any more when unsetting RANDOM ahead of it.