Biggest difference I have seen is a change from random trolls (often who were easy to identify and proud of who what/they were) to larger, organized campaigns. Even if the campaign isn't running on your forum, people are reading Facebook or whatever and this causes many people to start spouting similar stuff they have seen. And even here, the comments often get close to looking like astro-turfing. I barely read the comments anymore, usually only a quick glance to see if there are more links relevant to the topic.