I have found no indication that my TeamViewer computers were hacked, but after reading this for a few days I finally disabled TV on them last night and I'm looking for other solutions.

After using TeamViewer for over 5 years, I started getting a handful of invites on the service from random names about a month ago (I had never gotten a single invite prior). That alone signaled to me that something may be amiss. I'm afraid that where there is smoke, there's fire.