Somebody Else's Problem field

The Somebody Else's Problem field, or SEP-field, is a device from The Hitchhiker's Guide to the Galaxy that cloaks someone or something by making everyone view whoever or whatever is cloaked as somebody else's problem. They duly ignore the SEP-field. Thus, for example you can make whole mountains dissappear, simply by painting them pink and erecting a small SEP field generator.

This handy gadget can be found in flashpatches and can be activated in a PPC TARDIS if the chameleon circuits go haywire. It is not known if the SEP field turns the TARDIS pink.

The SEP field will cloak an Agent from being detected by characters in a fic, unless:
 * The person observing them is not a canon character for their continuum (Mary Sues and OCs)
 * A canon character becomes so OOC that he suffers a character replacement
 * The Agent draws attention to himself somehow. Talking won't do it, but a loud noise might, and interacting with the canon characters definitely will.
 * The character in question knows of the PPC's existence, or else is omniscient in some form

A SEP field does not protect Agents from being affected by events in the continuum. For example, it would stop Haldir from seeing PPC Agents and shooting them; but it would not protect the same Agents from being hit by a stray arrow during a battle, being drenched during a rainstorm, or being buried inside a collapsing building during an earthquake.