The ideal world you aspire to would be nice, but sadly not on the horizon. Trying to reason with a Troll Bot from St Petersburg will get you nowhere. The sole aim of those posters is desabilisation. We have one massive daily antivax poster, @Menta , now suspended for probably this very reason. Daily cuts and pastes from conspiracy blogs. Very rarely a debate. Same goes for a few others. Ridicule, mixed with a few facts, is often the only effective response. Otherwise why even waste time with a reply? Never seen a single case where this has changed the opinion of the poster. Rather it usually results in more conspiracy theories, stupidity and low grade trolling.