Reassurance. Sympathy. Someone to "talk" to, as often as you wish and at all hours of day and night. All potential benefits of Twitter that may offer psychological comfort, but is the tradeoff of creating a public record of struggle and potential for damaging feedback worth it?
I get that kids need an outlet to vent. I get that kids need to be with others who understand what they're going through. But this world of social has created an environment that eventually strings them along a path to a point where the very information they created can be their greatest demise.