There's a difference between someone being a sceptic and someone just being an outright troll who is just posting alarmist threads to purposely rile people up. He's not saying anything new and is obviously just getting kicks out of posting fud time after time.
If, as you say, there isn't the will amongst the staff to outright ban users like freightjoe and btc-room101, then could we have some guidance on reporting their posts? I would never report a solitary post simply for saying something I don't agree with, even if I do think it is just baseless FUD. But when these users post 20 times in under an hour, even when their posts are somewhat on topic, in my opinion it crosses the line from discussion to spamming/trolling. Can we report all their posts when they do go on one of their spamming frenzies?