[lm2s]

If X people send to an address and then the amount is distributed by a different number of outputs (for example 3 addresses for 1 person, 4 for another, etc) you can see how it can make hard to track down who has what.

[srtjstjsj]

Hard for people, but simple for a computer program to get a high-confidence guess as to which addresses are co-owned

[kompiuter]

I see, thank you for clarifying.