Since you used the past tense I'm guessing your children are grown up? I think it is much more well known now. When my DS1 (a teenager) was little I don't think it was common practice, but with the internet here to warn us of every danger I do think modern parents tend to be much more safety conscious. Plus, every piece of Ikea furniture I've bought (which has been loads in the last ~13 years and can't remember previous to that) has come with a wall tethering kit. If you're building it anyway it's just one extra step, doesn't take long. The only reason we haven't bothered in our current flat is because it's solid concrete walls and you need a hammer drill. When we've lived places with normal walls, we did tether tall cupboards/shelves.
I would not be concerned about visiting other people with untethered furniture because I don't tend to leave DC unattended at other people's houses but also, it's only a potential hazard, not a hugely likely one so if they are only spending short stretches of time there, the chances they'll have an accident with a piece of furniture is much lower anyway.