I've never considered it in the context of protesting guns, but I've always thought if I had ever been killed in combat, I would want my immediate family to consider it my dying wish that they wouldn't ever publicly criticize or second-guess the war I was fighting in. I shudder to think how many servicemen gave their ultimate, only to have their wives or other relatives trivialize their sacrifice by becoming unwitting propaganda tools for causes that run counter to their own beliefs. After all, let's face it: When I die, it's not about you or your needs – It's about me.
Getting back on topic, I'd want my family to feel the same way about me being killed by a gun – Basically, it all boils down to showing some respect for the way I lived my life.