How do cable installers handle the clear QAM issue?

Since many cable companies officially deny that clear QAM even exists and say that a box (or cable card) is required to receive any digital cable channels whatsoever, what do installers do when they hook up a new subscriber who has an HDTV and only subscribes to "analog service" ie expanded basic or limited basic. When they hook up the tv, they obviously have to go in the set up menu and switch it from air to cable and then run a channel scan. Do they abort the scan when the tv finishes scanning analog channels? If a tv first scans for analog channels, do they hit abort when "searchign for digital channels" or something similar appears on the screen? If a tv scans for both analog and digital together, do they hit abort when it passes the last analog channel number? Do they let it scan everything and then go into the delete menu and delete the clear QAM channels? Do they leave the clear QAM channels in and pretend ignorance about why the tv found some digital channels that officially it isn't supposed to receive? Or are they honest about the existence of clear QAM despite what their bosses tell them? Does anyone have any experience with this?