My new employer is doing their company surveys in an interesting way. They pull six or seven people into a room at a time. The facilitator has a handful of cards which have been folded in half and sealed. After he describes what we're doing and why, we get to choose a card from the pile. Inside, the card has a password (actually a number), which gives it a much more random feeling because all the pass-numbers were different and we chose one ourselves at random (rather than them using our employee ID or something). We have a QR code to access the survey or we can use the computers in the training room (which was what I chose*) to do the survey. From what I could tell, we all had the same survey questions but the only "proof" we did a survey was the facilitator accounting for my having been there to do one. I suppose they could narrow it down to one of seven in the room, but it's not like I roasted anyone (this time).
* I have a self-imposed policy that if my employer asks me to do something for them, they have to provide the tools to get it done. I don't use my phone or laptop to do anything company-related. If they ask me to drive to another location/office, then I get something for using my own car (usually gas money). A previous employer tried to force us to wear certain shirts as a "uniform" and I refused to spend my own money to buy company-dictated articles of clothing. A company who demands employees wear a uniform must pay for those uniforms (and they ended up giving us a token amount of money so we could go out and purchase them). Most people are so obsessed with their phones that they were likely thrilled to get a chance to play on it while at work, but I'm...less impressed.