I would have told them to go screw themselves, there's nothing wrong with using an s4 even if you aren't using it for timecode. Everyone has there own way they like to do things, just because you're not doing it the way they like to do it, doesn't give them any superiority to you. Porter Robinson uses a s4 and midifighter for his shows, and gets no hate for it. Porter Robinson is a bit different to Robsta. He's an international touring DJ, and people pay good money to go and see him. Robsta however, is just a regular peasant - and I can understand why people might be annoyed. Until you start going to clubs, you won't understand, but 95% of local DJ's will simply use CDJ's and a mixer, nothing more, nothing less.