Thanks for sharing Pmalek, these are clever ways of hiding our seed phrases. My eyes aren't good at finding those secret compartments but having a remote control could give a hint to an intruder that there's something inside the room or in the bathroom.
You won't take the remote and add a customer tag to it that says this is what it's for or even keep it close to the position where it controls.
Walking into modern houses these days, you will see a lot of remotes that you can't explain what they control unless you ask the owner of the place. Aside from that, an extra security measure can also be taken by hiding the remote far from what it controls.
I think most of the intruders are smart enough to identify things and if they've got some target areas when they do rob a house. Well, in case that if the owner of the house is too vulgar and talks a lot that their house has sort of compartment with some remote controls and stuff, that would give them an idea. But being far from the actual safe where it's placed won't be suspicious.
And I think someone who's an expert in tile setting might be able to find something odd if there are grouts that haven't been cleaned properly if this is going to be done DIY by a non-expert.
It's all depends on the location and how perfect the work is being done. If an electrician can perfectly install a hidden box inside a working socket without it being noticed, a good tiler can do the work perfectly in a way that another tiler can't identify.
If the owner of house is an electrician or a tile setter, that's better. But having this and letting someone to work for it, I don't think that it's a good idea. They're attracting some inside job with that.