They have been reading through archives and came across a talk that explains the three levels of LN, one of which they are interested in (level 2). While level 2 is said to be less efficient than level 3, there are concerns about security issues involved in level 2. This contrasts with another article that suggests level 3 would offer a better user experience overall by allowing users to outsource channel monitoring. The writer is seeking clarification on these discrepancies and wondering if outsourcing channel monitoring to a server could address the security concerns of level 2.