I think that that has now happened, at least in Mississauga.
I was updating my mythtv setup last night and had a problem with the video on digital channels. I was not getting a good signal to the mythbox from the HdHomeRun.
This morning I ran a full scan using the HdHomeRun and ALL of the TV channels are now marked as encrypted. For example, what you listed as Channels 132.1738 and 132.1739 (which Rogers had as 125 (CBHT) and 122 (CJNT) respectively) now turn up in the scan like this:

SCANNING: 843000000 (us-cable:132, us-irc:132)
LOCK: qam256 (ss=75 snq=70 seq=100)
PROGRAM: 1: 0.0 (no data)
PROGRAM: 1732: 0.0 (encrypted)
PROGRAM: 1733: 0.0 (no data)
PROGRAM: 1734: 0.0 (no data)
PROGRAM: 1735: 0.0 (encrypted)
PROGRAM: 1736: 0.0 (encrypted)
PROGRAM: 1737: 0.0 (encrypted)
PROGRAM: 1738: 0.0 (encrypted)
PROGRAM: 1739: 0.0 (encrypted)
PROGRAM: 1740: 0.0 (encrypted)

I am NOT sure whether all these channels are actually encrypted. A mythtv scan found 601 streams. When I updated against my EPG, which should have reduced that to 32 channels, I still ended up with 76 with duplicated names: 83#5 through 83#9 are all 'Showcase Diva'. and I do not think I got that previously. More time-wasting fun.

If they have encrypted everything, there will be a Channelmaster 8 bay on my roof toute-suite!
Geoff