I went through all names in the OP to see if anyone official participates in any signature campaigns. Here is what I found:

fillippone is part of the eXch signature campaign. I checked the spreadsheet and he has been a part of the campaign for at least two weeks.
BlackHatCoiner has been accepted in the Change Ltd campaign, so he isn't available either.
GazetaBitcoin participates in the eXch signature campaign.
bitmover name is on the BC.Game list of participants.
I can't find Stake's spreadsheets with the names of their participants, but I am pretty sure Charles-Tim is part of their campaign. 
hugeblack has been accepted into the Change Ltd campaign.
Chikito participates in the BC.Game signnature campaign.