What is the ruling on speaking with girls via phone or Facebook, and is it considered a debt upon its perpetrators, and do their families bear the sin, and what are the conditions for repentance from that?

It is permissible for a man to communicate with a woman via communication channels for a need, provided there is security from temptation and the absence of suspicion. What is said about this being a debt upon its perpetrator is a fabricated hadith.

Repentance from this involves abandoning the sin, regretting having committed it, and resolving not to return to it.

As for non-material rights of creation, the preponderant opinion is that seeking absolution for them is not obligatory if it is feared that seeking absolution would lead to harm, and that suffice is made with repentance and supplication.