------------------------------ Hi Tobias, Yes if it turned out that almost no-one used this then only the "Hide all image - recommended for users with slow internet connections" and the "Never show me this image again" options would be effective. My suspicion is that even if globally there were only a few thousand users then it would start to be effective on the most contentious images in popular articles in the most widely read versions of wikipedia (and I suspect that many of the same image will be used on other language versions). The more people using it the more effective it would be, and the more varied phobias and cultural taboos it could cater for. We have hundreds of millions of readers, if we offer them a free image filter then I suspect that lots will signup, but in a sense it doesn't matter how many do so - one of the advantages to this system is that when people complain about images they find offensive we will simply be able to respond with instructions as to how they can enable the image filter on their account. I'm pretty confident that huge numbers, perhaps millions with slow internet connections would use the hide all images option, and that enabling them to do so would be an uncontentious way to further our mission by making our various products much more available in certain parts of the global south. As far as I'm concerned this is by far the most important part of the feature and the one that I'm most confident will be used, though it may cease to be of use in the future when and if the rest of the world has North American Internet speeds. I'm not sure how spammers would try to use this, but I accept that vandals will try various techniques from liking penises to finding pigs and particular politicians equally objectionable. Those who simply use this to "like" picture of Mohammed would not be a problem, the system should easily be able to work out that things they liked would be disliked by another group of users. The much more clever approach of disliking both a particular type of porn and members of a particular football team is harder to cater for, but I'm hoping that it could be coded to recognise not just where preferences were completely unrelated, as in the people with either arachnaphobia or vertigo, or partially related as in one person having both arachnaphobia and vertigo. Those who find everything objectionable and tag thousands of images as such would easily be identified as having dissimilar preferences to others, as their preferences would be no more relevant to another filterer as those of an Arachnaphobe would be to a sufferer of vertigo. Of course it's possible that there are people out there who are keen to tag images for others not to see. In this system there is room for them, if your preferences are similar to some such users then the system would pick that up. If your preferences are dissimilar or you don't opt in to the filter then they would have no effect on you. The system would work without such self appointed censors, but why not make use of them? I used to live with an Arachnaphobe, if I was still doing so I'd have no problem creating an account and tagging a few hundred images of spiders so that they and other Arachnaphobes would easily be able to use the image filter and the system would be able to identify those who had a similar preference to that account. I was tempted to augment the design by giving filterers the option of having multiple filter lists with their own private user filter labels. This would complicate the user experience, but if a user had two lists, one that triggered their vertigo and the other their arachnaphobia it would then be much easier for the system to match them with others who shared either of their phobias. It would also be easier for the system to use either of their lists to assist the filters of others who shared that preference. However it would also give anyone who hacked into the filter database a handy key to the meaning of the various preferences, and it would put us at the top of a slippery slope - if the data existed then sooner or later someone would suggest looking at the user filter labels and the images that came up in them. So I thought it safest to omit that feature. Regards WereSpielChequers