The fact that the targeting part is the output of a multibillion-dollar industry focused on scientific experimentation on humans without informed consent. Also

The fact that the targeting part is the output of a multibillion-dollar industry focused on scientific experimentation on humans without informed consent. Also the fact that they're ads. That's a problem, too. Basically the whole thing is one big downside for everyone who isn't in adtech or trying to sell you shit you otherwise wouldn't buy.