In the other case, yeah, it is good propaganda. It's something great to stir revolutionary sentiment, truly. Honestly, myself, I'd like to see more. That's really it though. It's just a one-off event, perhaps with a couple copy-cats that result in nothing more than added security and bulletproof limousines. Countries in the exploited periphery still have yet to tear off their shackles despite their long history of direct-action. Left-wing urban guerillas in West Germany are a great example of this in the imperial core; they had plenty propaganda of the deed to draw people to their side and even enjoyed popular support. Without mass organization, however, they were unable to actually effect the conditions around them.

Those who engage in that form of practice in mass-organization successfully are culled. Fred Hampton, M.L.K, etc. Of course it isn't completely useless, it's called propaganda of the deed for a reason. It's that we have history to compare it to that shows us that ultimately it isn't much worth for change.

You're not going to be able to actually "change" anything without addressing the imperialism and the exploited periphery to deal with the labor aristocracy. What you can do is make an effect on your local community or build one, agitprop and engage in other forms of adventurism when you can. There are more effective things than shooting C.E.Os. I'd look towards the contamination of Israeli clean-rooms as an example of more effective sabotage.