One trick for cron is to prepend the actual command in the crontab with something like sleep $(( $(od -N1 -tuC -An /dev/urandom) % 60 ))m ; which will del

One trick for cron is to prepend the actual command in the crontab with something like sleep $(( $(od -N1 -tuC -An /dev/urandom) % 60 ))m ; which will delay it by 0 to 59 minutes at random.