Although I agree with the thought process of "You signed up for bowling on X day at X time", we have lost enough league bowlers that we need to accommodate those that are still here and with the changing dynamics in the workforce, pre-bowling needs to be allowed and to an extent, post-bowling.
I would like to see pre-bowling allowed anytime from the previous scheduled league session completes until the next league session starts, and post-bowling allowed up till the next league session starts after the night missed. If another league session occurs, you can no longer post-bowl, now you forfeit.
Just an opinion.