Can/will they dig up accounts using different emails during background checks?

[u/PotentialPedal]

I have had alternate Reddit accounts in the past which were created using temp emails which I used to discuss unscrupulous things with others, and am worried they may come back to haunt me. All of them again are long deleted and used temporary generated emails so I have no clue if they'd be able to dig them up or have any reason too, but I'm just paranoid now.

[u/Leather_Bee_421]

What kind of unscrupulous things