Of course, in case I'm lying. Duh.
Thing is, I don't have a habit of archiving every article I've ever read, so you'll just have to take my word for it.
A quick search on youtube however turns up several videos of seemingly peaceful community tanks, I won't bother linking. Also come to think of it one of the articles I read previously were of particular interest, I'll see if I can't unearth it somehow.
Anyways, I know the general understanding among fish keepers is that piranhas should always be kept in species only tanks, but as I understand it very few of the people repeating that have actually kept piranhas in community tanks. So I guess that's why I started a thread here, to see if any of you have actual firsthand (or credible secondhand) experience.
Just for the record, I'm not planning on doing this any time soon, it's a thought experiment, and it will probably remain so for a while yet.