To play the Devil's advocate here...
If we are talking free rolls, and if we narrow it down to online free rolls wouldn't it almost make since to open shove with any two cards at the opening of a free roll? I mean you loose nothing and you at least double your stack if you are called by even one player if you happen to get lucky and win. If you get real lucky your stack could even double or triple depending on the situation.
Take for example what I used to do on FullTilt back when Americans could play and they had those free roll
wsop and Poker After Dark satellites running literally ever 2 minutes. They were so popular that you had to have your finger on the mouse button, and you had to hyper click the moment the tournaments opened for registration if you wanted a spot in it. With these tournaments I would open shove with each and every first hand of the tournament each and every time I played regardless of what my two cards were. If it didn't work I was already less than 2 minutes away from the next tournament. If it did work I was sitting on a fairly large stack right off the bat. After the double up, sometimes triple I could just sit back and play a tight aggressive game. I could afford to wait for premium cards.
I will give you the fact that it is annoying to all hell to be in a tournament like this, but if you can't beat them then join them as the old saying goes. It does have a working strategy behind the concept, and one way to avoid this all in shove free roll tournament is to not play free rolls.
Those are just my thoughts,
Zer0 0uts