Well, that sure didn't happen! So I will just say this in a nutshell. I do think it is possible many of those kids were not from Seattle area, but as for imported for a purpose? Too tough to believe. Most conspiracy theories that might be believable in other cities would not hold water here in Seattle. The only theory that I couldn't poke holes in would be they were cops trying to get power back, but I still find that unlikely.
Still most likely a group of kids that want to break things for fun, and organized this whole event and just picked cities to target. I find it too bad that Seattle cops had their hands tied, and weren't able to show a tougher presence and nip... it... in... the... bud.