I see so many of the users of the forum who are having negative trusts getting accepted into bounty campaigns! Most of the campaigns do not allow users with negative trust to enroll in their campaign but there are some which do not follow this rule. Shouldn't the users with negative trusts be not allowed to set up signatures of any kind from the forum's end itself ?

To ensure that trust actually works and means something, shouldn't the campaigns which accept participants of negative trust be not allowed on this forum?