a little dog show of no real import

Right, except that they do act as a sort of advertisement for PerlMonks. One of the criteria for acceptance would be that the image is suitable for that purpose.

I suggest you declare yourself the sole collector and arbiter

Thank you, I accept. ;-)
However, we should probably obtain some kind of consensus that even this is an acceptable way to proceed.

have said images link to message outbox addressed to you

Er, no; I think it's fine for the monkpics to continue to link where they do now, namely Land of Monks and Honey. We can add a message and link to that node, explaining what one should do (e.g. /msg pmdev) in the event of problems.