A lot of philosophers have NedStat counters on their webpage. (A lot of them because I might have suggested it at one stage.) Recently NedStat has taken to having its ‘free’ counters be supported by popup ads. The effect of this is that if your page has a NedStat counter on it, readers may get a lovely popup thrown at them. I’ve already had this on two webpages I visited that are housed on university servers, and where I wouldn’t expect popups. (And I’d think having such commercial popups would be a violation of all sorts of perfectly good university policies.) I’m sure this is all inadvertant, but I’d like to recommend that everyone remove the NedStat counters as soon as possible unless they are sure that their counters do not generate popups.