I don't consider an external spreadsheet as valid proof. For example: anyone can enter my account with a any address into one of those forms, but that doesn't make me an alt-account. You're probably right, but there is a chance someone is being framed. I've seen enough people join bounty campaigns with someone else's Bitcointalk account.
Yeah, someone unknown convinced all these accounts to wear a signature and registered with these wallets ...
Spreadsheet from this thread :
[BOUNTY]Flixxo - Community-based video distribution - Sale 24 Oct.
And some of they used same ETH in Fradindo signature campaign, there I was find this farm rig :
https://docs.google.com/spreadsheets/d/1X6ay0cfiAeNUqz16bawVPnIIVUGRIWVad7jLa71DFnE/edit#gid=299234142