[thackney]

I've not purchased anything with it in several years nor have I done any restorations or refurbs since 2006. Aside from the "just to have it" aspect, does it make sense for me to keep renewing knowing that it could be used as a registry of doors on which to knock or am I already part of the machine having had one for the last 15 years anyway.

I think you are already past being counted on a list of people to visit, if it ever comes to that.

I would say you renewing it does not expose you anymore.

[Kozak]

as a registry of doors on which to knock

When they come they won't be knocking on any doors....

[GnL]

If you have to wonder whether you are already on “the list,” then you are.