[testplzignore]

This seems like it could work pretty well. It would be interesting to try it out.

I see two possible sources of bias:

1. The way in which a person labels the others won't be random. And multiple people may exhibit the same pattern. For example, let's say that people are biased towards trying to label an "average" person as #1. This might be based on height, weight, attractiveness, etc. Then a given person may have an uneven distribution of labels attached to them. Further compounding this could be that the most "average" person is the one most likely to be chosen by the second person.

2. You would need to come up with a random way to pair up the first and second person. The worst case might be that the same two people are always paired with each other, and each person always chooses the same person in the room. Then you would end up with a series of 10 digits repeating themselves.

[stOneskull]

i don't know how strict it is with having no props. i think a blindfold could be acceptable because it can be used from the materials of the people in the room but i don't know about actual labels (maybe post-it notes) or a marker pen. so the first person can't see the people and can only like touch their back to put the label on.

edit: but then it gets to where you may as well just put the numbers in a hat :P