There is no temptation to just pop away into another tab and start leaving annoyingly long and badly thought out comments on other people's journals...

Well, I don't find them annoying. ;-) Tabbed browsing, though... That has a lot to answer for. It just makes it so easy to wander around the Net harvesting links, so you end up reading twenty times as many time-wasting pages than you would do without it. Well, I do, anyway. (Though I still curse my stupid stupid work browser constantly, for not allowed tabbed browsing - because then I waste endless minutes sitting staring at load screens.)