It's coffee o'clock.

Hmmm... if one is following the particularly bad buyers related to one's feedback, I imagine the link would lead to the new name...?

eBay has actually also started to hide what previous IDs were in some cases (not all - I have yet to determine what triggers it). 

I've had buyers who's ID I didn't recognise, but name and delivery address were very familiar, so I've double-checked their ID history and it's come up as a list like:

j****7

y*****d

Because I knew their previous ID(s), I knew their actual ID wasn't just a string of asterisks bookended with alphanumeric characters.