Aggressive Stalking

Online terms - Periodically sending an ellipsis while in a chat room for the purpose to let others know of your presence without having to say anything. The equivalent to walking up to a group conversing with each other and just standing with them silently.

Bob: "If you put peanut butter on both sides of the sandwich, the jelly will ooze out!"

Jeff: "How much jelly do you put in your sandwiches? It wouldn't ooze out if I only put a little."

Michael: "..."
Bob: "You need to balance the peanut butter and jelly ratio."
Michael: "..."
Jeff: "Michael, what are you doing?"

Bob: "He's Aggressive Stalking* us."

Michael: "..."

*(UD wouldn't let me put "Aggressively Stalking") :/