Just place an address in the reply, I will quote it, so even if hacker changed the comment, The address will be in my quote. You can later sign this address incase you get hacked and recover your account.
Any Bitcoin address which you have control over.
1D5WRF8MxDzhXEipQjhfTB1UiBySRYtdeH
After reading ^^^ post address here https://bitcointalksearch.org/topic/stake-your-bitcoin-address-here-996318 and that's it.
edit
I have also read about this and based from it staking your address is an effective way of securing and retrieving account. If you go roaming around this forum you will see that there are many situations like this and other than changing password or email address, staking address is a common way of solving this. Better be careful because there are many hackers roaming around especially for wallets.