These AirTags keep looking like a really bad idea. Wasn't there a story recently where someone managed to use one of these as a tracking device for a person and their car, because any nearby iphone and ipad would respond to the tag or something?
Given that they announce their presence, perhaps it is a net positive. Real stalkers will be using old phones, GPS trackers, or some other solution that doesn't tell the victim what's happening.
You can pretty easily buy AirTags on eBay etc., with the speaker drilled out. Apple only very recently added a notification that an "AirTag may be traveling with you that is not yours", which definitely helps... IF you have an Apple device yourself.
So you, as a stalker, have to decide whether to roll the dice and send an AirTag along with someone you want to stalk, hoping they don't have an iPhone, hoping they don't have someone with them who has an iPhone, and also banking on them not handing it over to the police who will just send the serial number to Apple to get your address.
Or, you know, you could just get any one of a number of inexpensive GPS trackers that don't have these risks. Why again would you choose an AirTag?
As far as I know that notification has been there since day one, Apple has just adjusted the amount of time until it is shown. They are also adjusting the frequency and/or volume of the beeping to make it easier to hear.