  Observational consequences of the tidal disruption of stars by supermassive
black holes (SMBHs) can enable us to discover quiescent SMBHs and constrain
their mass function. Moreover, observing jetted TDEs (from previously
non-active galaxies) provides us with a new means of studying the early phases
of jet formation and evolution in an otherwise "pristine" environment. Although
several (tens) TDEs have been discovered since 1999, only two jetted TDEs have
been recently discovered in hard X-rays, and only one, Swift J1644+57, has a
precise localization which further supports the TDE interpretation. These
events alone are not sufficient to address those science issues, which require
a substantial increase of the current sample. Despite the way they were
discovered, the highest discovery potential for {\em jetted} TDEs is not held
by current and up-coming X-ray instruments, which will yield only a few to a
few tens events per year. In fact, the best strategy is to use the Square
Kilometer Array to detect TDEs and trigger multi-wavelength follow-ups,
yielding hundreds candidates per year, up to $z \sim 2$. Radio and X-ray
synergy, however, can in principle constrain important quantities such as the
absolute rate of jetted TDEs, their jet power, bulk Lorentz factor, the black
hole mass function, and perhaps discover massive black holes (MBH) with
$<10^{5} M_{\odot}$. Finally, when comparing SKA results with information from
optical surveys like LSST, one can more directly constrain the efficiency of
jet production.
