You can't leave unprotected access by law, because you, as a camera owner, are responsible for personal information stored as a record. If you talking about hacking, I wouldn't worry too much -- anything can be hacked and there are much more cost effective ways to obtain personal information in millions than hacking cameras one-by-one.
I wouldn't worry/care about individual hackers, but even if you have complete trust in everyone who has or will have legal access there are a lot of organizations for which hacking cameras one-by-one (even if hacking is actually needed) is well worth the effort.