TeamViewer - protect against hacking?

as seen in the news (june 2016):
there have been hacking activities through teamviewer.

at current it seems this was mainly because of careless end users.
for example:

• i have an account at linkedin with useame "[email protected]" and password "Banana53"
• and i use the same useame and password at teamviewer
• now by some leak hackers get access to cleartext contents of my linkedin account
• so they try to use the same useame and password for different services - refer https://haveibeenpwned.com/

in response the teamviewer corporation:

• strongly recommends to use different credentials for different services
• strongly recommends to enable Two Factor Authentication
• introduces Trusted Devices and Data Integrity

so far so good. but i'm having difficulties in understanding the exact security configuration of teamviewer.

--

for family and friends i'm doing a lot of "remote administration" (unattended access) and "remote support".
so on the target machines i have installed either TeamViewer Host 10.x or the full version - and linked it to my TeamViewer account.

i have set a "personal password (for unattended access)".
and i have not enabled the checkbox to grant my account "easy access".

problem description:

• on my local machine i open teamviewer and log into my account.
• when establishing a connection to any of my remote machines i never get asked to enter any password.

so whenever somebody hacks into my TV account (due to whatever reasons) he will automatically get access to all machines that re linked to my account.
the "password" feature seems to be broken?

how to introduce an extra level of security by making it mandatory to enter some teamviewer password matching the configuration of the remote machine?

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