Even people who aren't logged into the forum will see the big banner that reads "Warning: One or more bitcointalk.org users have reported that they strongly believe that the creator of this topic is a scammer.... etc." Not much you can do for people who read that and still choose to interact with the OP.
Funniest I've read so far today, it seems that those people that still fall for this is definitely deserving of what's coming to them because they're gullible and they don't have the survival instinct that should've been innate in our DNA as a human being, how are you those people not able to read those warnings with the red being such a contrasting color to the color of the forum which makes it easily spotted, I don't know how they'll be able to miss that, or they're so desperate about this crypto thing and they want to get rich so quickly that they're going to bite this obvious scam.
The guy is a notorious, long-time scammer that has gone by several other names like humbertin, humberroll, etc. He appears to be a professional scammer although he certainly isn't the brightest.
I wouldn't classify that person as a professional scammer with the way that he didn't even bother to change the names that he's using to scam people and to evade the people who guards against him and his scheme, I'd say that he's more of a dumbass lazy but patient scammer because no way that anyone will take the bait of this kind of scam everyday, it might take time before even one gullible user would even take this stupid bait or maybe not at all, that's why I added the patience virtue to the way that he scams.