<human>: Currently I'm in month 7 of a 12 month round the world trip, which means I've been staying in A LOT of hostels. I've come to the point where I can no longer just ignore a blatant lack of common courtesy. 

This morning a woman (not drunk) came into the room at 4:30am and turned on the room light as she started noisily getting ready for bed, waking up everyone in the room (3 other guys). Luckily I had a light switch next to my bed so I turned off the light while she was in the bathroom. When she comes out she turns on the light AGAIN and continues about her noisy business. Whatta slut. She goes into the bathroom one more time and I again turn off the light. When she comes out she keeps the light off, finally getting the picture.

Still fuming, I roll over and try to sleep, dreamily contemplating revenge, before I have to wake up to catch my early morning train to my next country.   

As I'm leaving in the morning and everyone is still sleeping with sugar-canes dancing in their heads, I see her scarf draped over the chair. I did the only logical thing and tied a big knot right in the middle of it.

Could you distill the essence of the text into 1-3 sentences?
<bot>: Dummy woke up a dorm full of sleeping angles at 4:30am so I went full Scrooge and tied her scarf in a knot.