I've started avoiding combat sometimes now. I don't like to have clutter in my transactions list, but sometimes I'm on my way somewhere and don't want any delays. Recently, as I was jumping to the next system on my route, I had to metaphorically slap myself as I'd just won a bounty and not collected it before jumping out. It meant I had to come back via that system on my next route.
I think it would be a good idea to have a 'hide minor faction bounty' option on the list, as well as an individual item abandon option (with a "Confirm Yes/No" answer to avoid any expensive misclick mistakes). When you have millions of credits in your balance you don't always want to bother with maybe four-figure values in the list.