Handling “block” votes

How do members want to handle votes to “block” resolutions from endorsement? There were three
blocks last I checked. On Loomio discussion groups what I have found basically boils down to two options:

1) a “block” is treated as the strongest negative opinion on the proposal and the member casting the block will not accept the groups decision, but it will not halt the group decision.

2) a “block” indicates a serious flaw in the resolution (and a lack of consensus) and if a member feels strongly enough to use a “block” then the group should honour it and not let the endorsement pass until the resolution meets the member’s satisfaction.

Curious what everyone thinks. We could easily vote on it!