Stats in the Wild

I’m still blocked from following @BillBarnwell on Twitter.  But what I don’t quite understand is what is the point of blocking anyone if your account is public?  I’m blocked from following him, but I can still read all his tweets because his account is public.  So, what do you gain by blocking someone?  There must be some benefit to it?  Is it just that I can’t direct message him?  

Cheers.