MOTS is always active, so no matter who is using the BeoSound 5, it will continue to find similar tracks to stream.
So, if Dad pops down and puts AC/DC on first thing in the morning before work, it will continue to find rock tracks until a child interrupts it, and plays some Spice Girls. MOTS then forgets the rock, and starts concentrating on pop tracks instead.
The user can interrupt MOTS at anytime, or just leave it to get on with things itself. However, the feature cannot be switched off - it's what the system is based around!