What is the fine-grained topic of the following text: Valleywag is making a fuss about it not because of the egregiousness of the flaw itself, which was really only useful to tech-savvy folk on the same wireless network as you, but because Tinder isn't being very honest about it, for fear of losing users, obviously. Only return the topic.
Tinder's dishonesty about a flaw in their system