Is there a signaling issue introduced at all? 1) can investors see that a startup is not at the venue or at a table all morning and get a feel for demand? 2)

Is there a signaling issue introduced at all? 1) can investors see that a startup is not at the venue or at a table all morning and get a feel for demand? 2) can investors gather any information from the matching results to get a feel for demand? 3) is there a chance for investors to send false signals by showing their interest in other startups artificially? Vice versa for startups at all (would require collusion so unlikely) 2 and 3 not so much but regarding number one, will physical observation of the meeting space introduce any signaling oppurtinities be it genuine or fraudulent by either party?