Hello!
Yes, insert the unrecommended Mantra everywhere you like.
By only inserting in to Login.cgi, one has to wait few seconds or more to get the mails appear and reload the page. By inserting to other scripts, it gets sorted out and would be offered in the first instance to any user. If this script is a tiny one would not offer any extra ordinary load to the server, and the loads will reduce.
The Genius gave a Chant that practically every script can sing and its harmless, eventhough not advised, remedy against cron

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