From my standpoint, infight self kill is really frustrating, especially when the guy who sk is a pure fragger.
A delay could limit some behaviors such as people who trick jump into enemies group with nades or panza, and who selkill before being killed.
To be very honest, I would disable also all the player weapons as soon as he has activated the sekfkill command.
Some pple will consider that I'm a bit extremist, but I consider that systematic uses of selfkill is a plague for the fun so any solution to limit this practice would be good.
😁