On your marks, get set ...
I really like the acronym here. I think that the concept works well for the task. It is something easy to remember and fitting to the task at hand. I am not sure though if Energy if the right word though. It isn't as fitting to the goals of the research. I will think of some other words and get back to you if I think of anything.
I know what you mean. But in a "to-and-fro" translation, "energy" was the result of what came to my mind (... thinking in german on an english briefing, hhhmmmh). Furthermore I hope "Social Energy" could be a real good circumscription for one of the prime movers in human behaviour ...
Last but not least: I'd like to listen to your advice - maybe "Social Encounter Tag" is an alternative covering "the good and the bad" in its meaning literally ... I'm curious. Please comment ;-)
"Energy" and "Encounter" both works for me, but here's another "E" word in case you need another possibility --> "Engagement"
Nice job on keeping it simple, yet with good meaning and pertinence.