[Olback]

I honestly do not know but they do. Possible reasons are:

1) Not paying full attention/ not willing to count etc
2) Would rather call/push and play for 1st
3) They get a big hand and cannot resist playing it.

We have to remember that not poker players play correctly.

But you are correct that if they were a decent player who undestood bubble play i would have to call here. However this guy was not this kind of player.