Time and place...
The first pic was meant as a joke, and I got a kick out of it. The next one I've seen on another post and can tell NY is awful proud of that shot (as he should be) and wants to show it off, so that's ok. Critter's pic was just put on here to be offensive, although it doesn't really bother most of us or we wouldn't be at this site. Thing is, if you want to promote your cause or make a point to someone, it's nearly impossible if you start out by offending them.
Another point, as a kid, mama taught me not to keep doing something when around people who didn't like it.She was refering generallyto pickin' -n- pokin', but the same idea applies to us as adults. I wouldn't show a dead animal pic to someone I know won't like it, and I don't know who might see it here- so without good reason AND cleaning it up as much as possible you won't see me posting any kill pics.