Section 8 of my copy of the Artistic License says:
8. Aggregation of this Package with a commercial distribution is always permitted provided that the use of this Package is embedded; that is, when no overt attempt is made to make this Package's interfaces visible to the end user of the commercial distribution. Such use shall not be construed as a distribution of this Package.
I believe that this explicitly allows the "stealth install".

In reply to Re (tilly) 2: GPL/artistic licence issues by tilly
in thread Non-Disclosure Legal Fun w/ my ex-Employer by idnopheq

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