[PD-SYS] Visitor Filters - are these up to date?

I've noticed I'm dealing with a fair amount of bot clicks on emails, where I can see one prospect has clicked virtually every single link in an email on multiple days. Anecdotally they mostly seem to be from China, or education/university email addresses (the latter I am guessing is coming from university spam protection tools). 

I was reading about visitor filters here:

That page says it was published in Sep 2025, however I can see that all our visitor filters say Last Updated 1 April 2019, which I believe is when the organisation got Pardot.  

Does that mean these filters have not been touched since then, and are they still relevant? I would imagine a lot could change in 7 years...