I do wonder how easy it is to de-anonymise a typical reddit user based on topics, ways of writing, time of writing etc. throw into some form of pattern recognition and see if it links up with other reddit accounts, accounts on forums, things like Facebook etc.

Throw in information Reddit has (ip addresses, user agents etc) and it’s no doubt a certainty.

You would probably get the right person in a list of candidates that would be too long to be useful.