Paweł Pokrywka's lightning talk at wroclove.rb 2019. Opens with the confession that he loves receiving spam, then reports a 12-year experiment: for every site he registered on he used a unique hard-to-guess email, and when spam arrived on that address he knew the site had leaked. Of ~800 sites registered, 15 leaked — roughly every 50th registration gave data to criminals. Named leakers include LinkedIn, an 'Indian DNS', and a vendor of SSL certificates. Frames this with the observation that 40% of freelancers in a recent study stored passwords in plaintext, and some 'fixed' this with base64. Second half pivots to 'naming people' — specifically the title 'senior developer'. Asks whether seniority means technical expertise (senior Ruby/Rails/React/ClojureScript developer), computer-science principles, domain knowledge or soft skills; whether a senior Ruby developer is still senior after moving to Python, web → gamedev, etc.; who gets to name a senior (peers? HR? oneself?); what a 'local senior' means in a mediocre company; and warns that titles can be used in lieu of raises and reveal more about company and personal goals than about skill. Ends by announcing that code from his wroclove.rb 2017 performance-prediction talk, previously owned by his university employer, is now on GitHub as a Ruby gem based on Petri Nets, with a second gem for the Petri Nets model itself.