got once i was suddenly invited into a conference with like 20+ people, that time I was afk but I keep hearing "de dum de, de dum de"

so I went to see who msg me, whoa holy crap, 20+ people all talking non stop and I dont even have a clue who the hell they were. so I asked who are u guys and they all say "I'm john" or watever I cant remember exactly, and none of them I recognize. so I said wtf and I left. but some of them lamer add me to their contact list later still msg me and say "who are you?" and I'm like "who are you?" back.