In the past I have told the table that I have to go and do not bet unless you have it. Then I call everything until I am out of chips. I also tell the table what I have.
This prevents, yet another sit out player in the game.
I usually do not do this because I try to be sure that I have enough time to play before I register.
The only time that I will register when I do not have time to play is in a forum freeroll, only to show support for the forum.