The problem with this is, leaving a squad to join another requires you to spawn in, so you won't have an immediate advantage, and requires you to die before you can spawn on your new SL. Anyone who is already dead, won't have the luxury of changing squads, and needs to spawn in before they can join that squad and die again so they can spawn SL. Dying is not a tactic, so your just wasting time, and splitting your squad up.
Do what most do, and keep the SL alive, and if he does die, then next time round he might be lucky enough to break through. If he continues to die try after try, then he needs to do something else, as it's not working, and your losing tickets!!
This doesn't answer the legality of the tactic however, which can only be done by
Contacting the Admins