We encourage all pledges to complete the pledge process, however, we do have a vote at the end of the pledge period. We do tell pledges that if they compelte the requirements set before them, there is a good chance that they will become Brothers, however we also warn them that it is up to the Faternity. I know in the last few pledge classes we have had to restrict a few pledges from becoming Brothers, but it was because they didn't meet a requirement that they agreed to. We (thankfully) haven't encountered a situation with an unruly pledge as of yet.