Exactly. Since you don't go into detail about the 
facts of the situation, it really boils down to 
how important this issue(s) is to you. Also 
whether or not whatever this person(s) is doing 
will still in fact bother you tomorrow. Moreover, 
IMO if it doesn't directly involve you leave it 
be. 

If you feel the urge to vent try a journal. This 
will prevent imposing on your friends who care 
about you, but might not empathize since this 
situation might be cels related. Many of my 
friends flatly consider cels to be a waste of 
money. Afterall they are decomposing sheets of 
acetate and paint, but I for one enjoy mine. They 
however could care less and rather travel or 
drink. The point is, if you cannot stand it, just 
email these people directly but since it doesn't 
actually involve you... I don't see why they'd 
give you the time of day. Just my 2 cents.