Definitely not. Case 1. Fixed home broadband often allocates a single IP that the household might have for weeks, months or years. There might be only one pers

Definitely not. Case 1. Fixed home broadband often allocates a single IP that the household might have for weeks, months or years. There might be only one person in the house, and even if not it's easy to build a profile across websites visited on how many live there, what time they're active, etc. Case 2. Mobile broadband often allocates IP seemingly based on the tower you're connected to (in my country, I can notice this effect). So, looking at the surface of the you'd think it arguable that mobile IP is anonymised... Unfortunately, people are creatures of habit and ping the same towers repeatedly. So it's still possible to track. In short, if there's value to be had in storing any value (like an IP) for ad related purposes, then there's more than a good chance personal information is leaking.