I am not sure if by any chance they do the extra mile to check on that. However, as a rule of thumb you should try to keep private stuff away from work stuff, meaning, at work maybe is not the best idea to boast about your reddit profile where you happen to follow some nsfw stuff (or other stuff that can be considered offensive and/or can lead to controversy). I would imagine they try to check things such as accounts attached to an email or phone number (for instance). If a set of aliases were used for this (or different info) from your work email phone etc., you should be able to keep it separate.