And no, seeing how cluster ammunition is practically used, russian civilians are not going to disproportionately harmed. It’s going to be military targets which will be fucked up.
The issue with cluster munitions isn’t how they’re used, but what happens when a bomblet fails. Cluster bombs release hundreds to thousands of submunitions, and when one bomblet fails, it can remain armed and ready to detonate if/when someone comes by and bumps it, picks it up or runs over it with a tractor.
This can lead to issues long after the war is finished, as people are doing their own thing and get hurt or killed.