Because I am silly...
I want to have Grell climbing in your windows, snatching your presents up. He'll be accompanied by his hapless accomplice Keigo, who's got mistletoe strapped to his head instead of an antler...
Of course, William T. Spears is going to catch Grell in the midst of this nefarious business; and, accompanied by Nana, return all the presents in a fit of Cute Overload.
BUT WAIT!
Grell has switched the tags, so the presents might not make it to their intended recipient. So, for instance, Raul Creed might get the edible underwear intended for France!
tl;dr - inadvertent and inappropriate Secret Santa!
Various opportunities for shenanigans, from being burgled by Grell, to reacting to receiving a really wrong gift, to dreaming up horrible presents for your CR (the 'from' tags can be left intact if you like!). The more the merrier!