Ok so rattlers like tormenting people because it provides them fun and if you make it happy enough it will give you something as quoted here.
Quote:then I move my light towards the spot, there was Super Almond Water on the ground, and a message that read ‘That was the best fun I’ve had in ages, and you even managed to get away, what a lively subject for me to play with :), you’ll need this. Just in case you come across another Aksiejwe.
So if you bring a nintendo switch to the backrooms and play some mario kart with a rattler you could potentially make it so happy that it starts protecting you and gives you some super almond water B)