Bitcointalk has been hacked three times over the past 10 years and, in addition to that, profiles are often become the target of different cheaters.

In December 2018 the new recovery procedure of accounts has appeared on the forum, but I'm sure that many users don't aware about this function, because it is necessary to keep reminding about it (examples: 1, 2, 3).

So I believe that for secure and develop of the community, Bitcointalk administration need to send an one-time mass emailing to all addresses, registered in the forum database, with notifications that profiles can be restored if they were hacked, and add the link to the topic "Recovering hacked/lost accounts".