I like the idea. It amounts to rejection of the whole pool of candidates.
In IRV, if exhausted ballots add up to the majority (and people understand this so they can choose to not rank candidates they disapprove of), the election is canceled.
In SRV, perhaps it would be that to reach the runoff, a candidate must have a majority of ballots giving them a non-zero score.
If a voter abstains from a race entirely, they wouldn't count toward what constitutes a majority, so there needs to be a way to explicitly vote NOTA in IRV (score some 0s in SRV works).
What happens if NOTA wins?