Future idea for resolving certain rules calls that require players in the group to either see it when it happens like foot faults, last point inbounds and making mandos or see it such as line calls for IB/OB. Players in the group can make these calls and what it means:
(A1) "I am the rule caller" = "One vote for caller's vote"
(B1) "I vote with the caller" = "One vote for caller's vote"
(C1) "I did not see it" = "One vote for caller's vote"
(D1) "I vote against caller'" = "One vote against caller's vote"
(E1) "I can't decide" = "Half vote for caller / half against the caller"
Add up the votes for the decision. If it's tied in several ways such as an (A1), (C1) and 2 (D1) votes, benefit to the caller (not thrower). The important thing here is with option (C1) as a default when the player isn't looking, the caller gets a full vote in their favor whatever that is. Hopefully, that's an incentive for more players in the group to pay attention, including the thrower in the case of foot faulting.
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(A2) "I am the thrower" = "One vote for the thrower's vote"
(B2) "I vote with the thrower" = "One vote for the thrower's vote"
(C2) "I did not see it" = "One vote for the thrower's vote"
(D2) "I vote against thrower" = "One vote against the thrower's vote"
(E2) "I can't decide" = "Half vote for thrower / half against the thrower"
Add up the votes for the decision. If it's tied in several ways such as an (A2), (C2), 2 (D2) and (E2) votes, benefit to the thrower. The important thing here is with option (C2) as a default when the player in the group isn't looking, the thrower gets a full vote in their favor whatever that is. Hopefully, that's an incentive for more players in the group to pay attention.