> Who decides what a spurious veto is?
The group decides.
For example:
"I just don't like this proposal" is an example of an invalid block.
"This proposal to rent a nightclub for an after-protest dance party has problems because we lost money on a similar event last year" is a valid block grounded on legitimate reasons having to do with the proposal.
Of course, a group should try and find out the basis for all blocks, even if they aren't articulated well in the first place.
Chuck0