If i use more than one denounced on stage in one turn does it add more than just the one extra honor loss?
Denounced on stage stacking
A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
If i use more than one denounced on stage in one turn does it add more than just the one extra honor loss?
Two effects each saying to increase something by 1 will usually lead to the thing in question getting increased by 2 total.
So, yes, they do indeed "stack," as it were.