Unstick the tape to see what is under, check what is inside light switch, what is the problem? If you find something, make photos, share them with class.
However, if you rent a house, tape could be from previous tenants, you just don't bother when move in, but it draw your attention now, when things made you upset. Paint on screws could fall off by itself, especially if it is a relatively modern thing used frequently. Take a magnifying glass and check the screwdriver slot in screw - it will be obvious if paint just fall off or had been scratched by screwdriver.
PS: Even if you really develop some paranoia, that does not mean that nobody surveil you.
Unstick the tape to see what is under, check what is inside light switch, what is the problem? If you find something, make photos, share them with class.
However, if you rent a house, tape could be from previous tenants, you just don't bother when move in, but it draw your attention now, when things made you upset. Paint on screws could fall off by itself, especially if it is a relatively modern thing used frequently. Take a magnifying glass and check the screwdriver slot in screw - it will be obvious if paint just fall off or had been scratched by screwdriver.
PS: Even if you really develop some paranoia, that does not mean that nobody surveil you.
No you are not
If you didn't do anything wrong, you have nothing to worry about. Just ignore it or give them something bizarre to watch and hear
Probably not other than your phone