Yeah, this is something I've been thinking about too. I think you're right.
Ultimately, the rules say "anything goes", so I'm hesitant to tell people "anything goes but that". Strictly speaking, it's not against the rules. That said, you're right - there are definitely some entries that seem maybe a little bit hasty?
So I'm honestly a little bit at a crossroads on this! I wasn't expecting this jam to take off the way it has (though I'm extremely excited and grateful that it has).
Does anyone else have any thoughts on the topic?