you don't strictly need to run a full node for lightning, though you're relying on someone to be your watchtower. deposits is the same, except the watchtower role (quorum members) is incentivized to act out of both benefit and obligation: classically, fear and greed. by requiring that quorum members have at stake at least half of what could be stolen, and requiring collusion to steal, and having transparent operations, it appears that individual ledger collateral ratios around 50/50 may require a sybil group close to half of the network in order to profitably steal