Going to posters for works you already know to talk to authors seems a great idea and I do it. Re-reading your OP, you suggest things like checking papers are fake or not in poster sessions. Maybe you just meant papers that you already knew about? It sounded as if you were suggesting doing this for random papers, which I’m more skeptical about.
I agree that twitter is a worse use of time.
Going to posters for works you already know to talk to authors seems a great idea and I do it. Re-reading your OP, you suggest things like checking papers are fake or not in poster sessions. Maybe you just meant papers that you already knew about? It sounded as if you were suggesting doing this for random papers, which I’m more skeptical about.
I presumed that Jan meant doing it for papers that had survived the previous “read the titles” and “read the abstracts” filtering stages.