I’ve had good luck with my link bulbs too. I also have other people in the house from time to time (cleaners, pet sitters) that are notorious for flipping switches off that they never touched in the first place to turn on. Infuriates me because then I come home to outside lights turned off, no lights on inside, etc. And this was before I dove into Home Automation.
I googled and looked over several switch guard options and they all seemed more expensive than I thought they should be ($7, really??) or intended to keep a switch in the permanent on or off position. That might work in some cases, but I personally have found a need to flip on a light that I was standing right next to, but didn’t have my mobile in my hand. It’s possible to throw the switch off then on and the light comes on just fine. I haven’t had a problem with loss of control via the app, but admitedly I also use this switch flip option rarely.
But I digress a bit, in the spirit of giving some background to my DIY switch guards. I ended up in Lowe’s in the electrical and plumbing aisles, and settled on two items that I thought would work. One is a roll of pipe hanging plastic that has small holes at regular intervals. Holes are perfectly sized for the same size screws used to mount a switch plate. I screwed one end in place, bowed the plastic tape over the switch, and then bent it so that a lower hole lined up with the mount screw. This leaves a curved piece of plastic strapping bowing over the switch but leaves it accessible to use from the side. This has been enough to break even my own habits of throwing a switch to off when I leave a room. Hopefully it will do the same for others.
Like this, only made out of white plastic:
The other item that I found that works well is copper pipe straps. I think the ones I ended up using were 1" straps.