Its a tool for solo players, but given that it has to be alot slower and alot more cumbersome then just throwing an alt into the system, it doesnt discourage teamwork at all. It encourages teamplay, over using this method, but at the same time it gives a tool to solo players, to use or not.
We have plenty of niche ships, for very specific purposes that rarely gets used, so that cant really be an excuse…
The unseen part refers to the gatecamp being able to destroy the probe before it sends information back to the ship which launched it, effectively still making the gate camp unseen by the guy using the probes.
Solo players is just as viable a gamestyle as anything else in eve, thats the very nature of this game. Do what ever you want.
It doesnt discourage interaction, it provides another level of interaction, if implemented correctly.
All im saying is, if something like this is to be implemented, it has to be gimped enough to encourage teamwork over using it.