When using big crushers for asteroid reprocessing, you can create a net-postive loop which can let you 'create' asteroid chunks for free. I believe this happens because of the 50% productivity bonus inherent to big crushers. On space ships, this means you could effectively remove the need for asteroid collectors. Also, with Muluna installed which allows for asteroid crushing recipes on regular planet surfaces, this would also allow creating base ores out of thin air as well.
Granted, it would need a sizable build to generate a decent amount of ores, and it would be comparable to having a platform collecting and dropping ores onto a planet, but I feel as though this is an oversight. The only solution for this I can think of is to ban reprocessing recipes on big crushers.