I do not believe this. Whilst we may have vast amounts of data from the electromagnetic spectrum, there are only a handful of neutrino detectors on earth, and they have a very narrow research domain. Not to mention that as neutrinos are so unbelievably weakly interacting the quantity of neutrino interactions ever recorded is minuscule.
The viability of neutrino messaging seems... dubious. The fact that solid matter is almost perfectly transparent to neutrinos makes them a singularly bad candidate for information transmission. You'd need a pool of water the size of the solar system to detect enough of them capable of carrying a meaningful message.
On the other hand, there are large parts of the EM spectrum that are attenuated only marginally by inter-stellar gas and would be much more suitable.