I was checking the profile. It did not post yet and last active session was July 20. There is high chance that someone entered their dirty hand and got the access. High profiles like this account should go through proper security check to verify the original users authenticity.
I think the forum adminstrators already took a look at it. Even they did not at beginning, after this topic was created for a while, perhaps they already did extra check on this account and its recovery process weeks ago.
It will be hard though if the legend destroyed the private key of the addresses he used.
Satoshi Nakamoto warned that Bitcoin users should never delete wallets they used and I think laszlo knew this reminder too.
If he has no intention to keep his past wallets, he can delete them or he just lose them somehow and I don't think it is too serious. If those past wallets are empty, he can lose them somehow or delete them by himself even there is chance of someone will continue to donate him bitcoins.
Sigh... why delete a wallet instead of moving it aside and keeping the old copy just in case? You should never delete a wallet.