Recently I've seen a few id requests that say right in the question something like "By the way, this might not be anime." Usually they think it might be a Western cartoon. In one case the OP thought what he was looking for might be either Chinese or Russian (which is extra hard to decide on, because Chinese animation would be on-topic but Russian animation would be off-topic).
The first few were all horrible anyway, so I voted to close them as not meeting our minimum guidelines, but the last one I reviewed looked like an acceptable id request, except that the last sentence was "Also this might be an English-language cartoon." I skipped it since I wasn't sure what to do with it.
The problem here is that we're not a general purpose media identification service; Western cartoons and comic books are outside of our scope. If someone showed up here asking a question about Scooby Doo, we'd close it right away. In these cases, the OP thinks it might be anime, but also thinks it might not be, so it might be on-topic, or it might not be.
What do we want to do with these?
Note: Sometimes the OP doesn't say the show might be non-anime, but it turns out what they're looking for isn't anime. We can't do anything about that. This is only about cases where the OP actually writes in the question "This might not be anime" or includes a picture or something indicating that it's probably not anime.