I'd like to recommend that when someone asks for sum/sumrp/sumdd/whatever,
people announce it on wanted right away...I keep a second sum command just for
this purpose:
'wsum' is a command-alias to ';;cast 'summon' $*;;tell $* summing you;;wanted
summing $*;;remove ring of lead;;party say $* -> here'.

And, if everyone except the first person to announce it cancelled, there would
be fewer summonballs...