Disconnections

In recent games, I have noticed many people disconnecting at critical positions and coming back with moves dat exactly mimic computer engine suggested moves. Why don't we have something like the pure pools in other servers, where one can join say a 15 10, 5 0, or 3 0 pool where disconnection means loss of the game. Others could still play in the regular time controls where disconnection is allowed. That way, we could have best of both worlds

I know, right?

I fail to see how taking 2 minutes for a critical position, instead of disconnecting, cannot imply using a chess engine.

In fact, I do not see any reason why a chess engine user would disconnect in order to make his chess engine working. All he needs is time.

With that said, taking minutes for a critical position does not imply a chess engine user. Critical positions often decide the game, hence the part critical. And I can understand why people would take minutes for that.