I have far too many memories of freeze damage in "winterized" homes where the winterizing procedure consisted of shutting off the main valve, opening a basement drain in the potable water system, opening all faucets, flushing every toilet, adding automotive antifreeze to traps and toilet tanks/bowls, and turning off the heat.
I’ve also seen damage from homes winterized by blowing compressed air to evacuate water in the hot/cold piping. Then, there were the homes with hydronic heating where no thought was given to winterizing the hydronic system. Split water and hydronic lines in basements often survived, but first- and second-floor water lines and hydronic piping, baseboards and cast-iron radiators often had multiple damage splits, cracks and/or fittings pushed apart. Once the home was sold and the new owners turned the heat and water back on, they discovered they had purchased an indoor sprinkler system! Ceilings, carpet and hardwood flooring damages soon followed, resulting in thousands of dollars for water line repairs and restoration cleanup.