Re: And thus..
How do you keep a rogue process from making a fake tag when the process can match any tagging the logging system uses?
Even if you can - and your newline argument is bogus - all you're doing is cluttering the logfile; you're not removing any genuine logging, just adding a bit of noise.
And if the log you're trying to dibble with has a separate file (e.g. maillog), you don't get to write to that file anyway. Putting sendmail messages into /var/log/messages will ring every alarm bell there is...