I'm new to the NXCAM from a Panasonic P2 system, where I used the "mark clip" function frequently to delete unwanted clips in the field. I've looked through the assign button menus but so far haven't been able to find an equivalent to marking clips -- I'm assuming one exists somewhere, right?
I shoot primarily sports and often am in a crunch to edit and turn highlights around as quickly as possible. Deleting unnecessary clips during timeouts or halftime helps me to streamline my ingest and edit work flow.
It is a bit risky, I admit, but in five years of working with P2 I've only accidentally deleted a clip I still needed once. *Knock on wood*
I find it an extremely helpful feature and am disappointed that it sounds like Sony doesn't have it.