The slurping of the kool-aid is not limited to SV. I've seen it at a couple of companies I've worked at in the past. Both were media/post type of studios where one you've probably heard of before and the other probably not. They both had employees that had their tongues stained the color of the kool-aid they drank. Seeing people wearing the SWAG shirts and hats of the company they work for in the office is just so cringe to me.
Some people just don't like buying shirts.
I'm not a huge fan of my old company, but they had great fitted & soft T-shirts. I wish I had more...