It's possible the off-topic ones are gone now - I reported a couple yesterday, and the remaining ones did seem to be at least tangentially on-topic. It's these latter ones I guess I'm curious about - can they be reported, or does being on-topic make them OK, even if they're low-value and spammy? I feel like I'm making subjective judgements, though - I wouldn't trust me as arbiter of all things useful, so I need a second opinion before I go mad with the "report" button!