Active camo glitch/hack?

I just finished a game of big team on Exile. During the entire game I noticed this one individual who could use active camo without giving off the little blue waypoints (witch on side note are useless). Is this some sort of glitch or hack, or is there a specialization I don’t know of that allows this to happen?

Which* No specialization for that.

Happened to me as well. I wonder if it has something to do with ordnance markers glitch. They usually don’t show up for me in BTB.