a quick guide to recognizing 5 panel
it's safe to say that your assumptions about a person you suspect of being 5 panel are correct if he/she got into techno or house after you did.
it's also safe to assume that if you got into said genres at the same time, the other person is only doing if because it's popular, hence 5 panel.
another element crucial in determining if a person is 5 panel or not is their conduct at nights:
staring at the dj is 5 panel
standing with your arms crossed is 5 panel
showing any type of appreciation other than vaguely dancing with your back towards the dj is 5 panel
being overly enthusiastic or "fun" is 5 panel
doing any sort of drug other than smoking crack is 5 panel.
you will also have to take into consideration the person's clothing, as to not mistake deep house bros for 5 panel.
hope this clears up the confusion
