I have recently wiped out (deleted) four entire small sites of mine, they were affected EMDs. I did nothing more than close down the hosting account so nothing remains.
I believe the effect on other sites within that account will be zero but that's just a personal opinion. I transferred many of the deleted pages to my main site in another account with no attempt to hide the fact - same, titles, descriptions and content.
So far all is well though I will report back if anything changes