That's a good point, though we tracked the paralyzation of Vaarsuvius (by ghasts), O-Chul (by Xykon), and one of Tarquin's guards (by Durkon). On the other hand, we didn't think to track Thog's paralysis by Durkon.
It is an invisible effect. Maybe we shouldn't track it. Opinions?
Browsing through the "notable alterations", they're either indeed physical alteration, hinted at through visual clues, or representation of the characters on another support. Paralysis is the one exception as an invisible effect. If it becomes subject to interpretation, it should just as well be dropped.
"I took Craft Disturbing Mental Image as my feat last level."