I'd like a 'timeslot' feature that I could set myself eg. block my account all day except between 10pm and 11pm. This actually occurred to me previously when I activated the noprocrast feature, which was good also
Maybe a way to get around this is to remove the links (not the text of the links, but the link functionality itself) unless you have an account and are logged in.
I guess in the end, if you don't have the self-control needed not to throw away your time reading about things (instead of doing things), you probably aren't going to benefit from being blocked from HN. You'll find something else equally unproductive to fill that hole.