I mentioned in my first post that you have to know the people that you are golfing with. If such a prank would cause them to seriously become annoyed or angry after a single time, then that would not be a person that you would joke with like that. In that way, I don't find it a breach of etiquette at all, because you know the person you're joking with won't take offense.
And I've been around this site for around 3 years, now. Mostly lurking without posting, but I've been around for a while. And I stick around because there is some great information available here and I love the game of golf. Sure, I disagree with the opinions from some people, but that's not enough to scare me off.