I like IDs. I have a VPN, but I really only use it for ban evasion.
I've never used it to try to make myself out to be multiple people in a thread, and anytime it auto switches my IP for whatever reason I will point out that I am still the same person, just so I don't give the impression of being a shill. I even flat out admit I'm ban evading and that's the reason I'm even using a proxy.
I use IDs to scroll through a thread to see what kind of poster someone is in a thread. In my opinion they really help to distinguish shitposters and shills from legitimate posters(not a 100% of the time, or even 80% of the time, but enough of the time where I do use IDs when I'm jumping into a thread late in the conversation.)
I like IDs.