I used to be one of "those people" that lived off killing other people in EVE (merc, not pirate, but nvm) and I mostly play ED solo now. I doubt I'll be pirating or do much PvP except defend myself whenever the servers can be trusted to play multiplayer. Solo is nice for getting some cash for better gear until then. When you sink all you own into a trade run, being pirated and killed due to lag and what's not isn't very enticing right now, hence Solo. But I fear that Frontier is a bit naive when they expect most pirates to do anything but blow people up. The people that held people up and didn't blow them up in EVE can be counted on one hand, I expect the same attitude to happen here as well.
I see it's a bit easier to get away in ED, but I expect pirates to complain about interdictions not being easy enough and that they'll change that. I hope to be proven wrong, though.
I agree with most of what you say except, in EVE when you trashed a ship there would be loot left behind sometimes worth millions, but in ED if you blow up a ship there is no loot, so for a Pirate to make Creds, traders have to expect to be allowed to escape if they drop some loot or they will fight/run. If a pirate kills all his victims he will make life harder for other pirates and so I would expect them to be as eager for him to be taken out as the traders were.
BTW So far Piracy is the one thing I have not tried, having a go at mining atm.