See, the thing is though, this is a completely voluntary program. One is not required to step onto a scale, nor will they ever be denied boarding for doing so.
I’d like to remind people that this is not an exercise to ensure people boarding aren’t overweight, nor is it to shame passengers who exceed weight limits for carry-on baggage. Finnair has a completely voluntary system dedicated solely so that they can get a better grip on who’s boarding their planes and how much fuel that they need onboard. No one is required to do it, and no one will be required to do it either. For those of you who are self-conscious (myself included), rest assured knowing that there is zero chance they will make you step onto a scale.
This is not a new procedure. Many airlines, especially those who are operating smaller aircraft in which weight is sensitive (think anything smaller than a 737), weigh their passengers without them even knowing it. In fact, the FAA mandates airlines in the US to conduct “weight surveys” to ensure that their weight and balance calculations are correct. Without telling you, you may have been weighed without being told! Hawaiian Airlines’ flights to American Samoa are so long that they weigh their passengers, and the same is true on most flights where an accurate weight-and-balance calculation is imperative. Air Canada, for one, routinely does these surveys for every passenger and crew member. So while this may seem like “news,” this is actually a fairly common occurrence.
Does that excuse the surveys? Not entirely. While I’m sure that statisticians have factored in the “opt-out” rate, this also doesn’t seem like it would accurately represent the actual weights of passengers, seeing as every voluntary survey is always skewed.