* Tracking without consent * Wasting large amounts of resources * Potential security risks (js ads with malware is a thing) * Potentially gathers a lot of da

* Tracking without consent * Wasting large amounts of resources * Potential security risks (js ads with malware is a thing) * Potentially gathers a lot of data that could be abused by others Contextual ads aren't _that_ bad, assuming they're simple enough to not run actual code on the client devices, and the clients can spare the bandwidth/resources in their end. Until that's universally true ads are a nuisance at best and actively hostile at worst.