mybitcoin.com is the last place I would look for security. They did nothing about the MtGox security breach, so users lost over 4k BTC from the site.
What could have they possibly done? They were actually quite preemptive, blocking and changing passwords of same-name accounts. You cannot blame them for (1) MtGox leaking its passwords and (2) people using the same username/password in both sites, which are so related and critical in terms of security.