The term #maninthemiddleattack has recently fallen out of favour, after all it could very well not be a man that's listening in. A popular replacement seems to be #machineinthemiddleattack. I think this is a huge missed opportunity for some fun with words. I propose to you:
1. Malfeasant in the middle
2. Mischief in the middle
2. Malcontent in the middle
Do you have any other fun ones?
Edit: heres another one: miscreant in the middle.