You may have noticed some online games have "no all-in" tables. In case you were wondering what these tables mean, it means there is no all in protection. In other words, if you get disconnected your hand would be folded if there is a bet to you.

Unscrupulous players have been known to disconnect in tables where there is all-in protection, allowing them to get paid off on the money they've bet if the opponent is bluffing, while not losing a stack when villian has a set or a straight draw that hits. This situation got to be pretty bad and happened very often back in the day, but I do not see it much now.