After what the NFL has allowed refs to do to New Orleans- inc this weekend- anything is possible. I am constantly amazed by the competence. I blame the owners: the NFL is a $15B/yr business, but the owners are so cheap that even now most refs are doing a part time job and not performing a serious profession with proper training.
Insecure people tend to make more mistakes. Personally, I think the continued incorrect usage of replay (trying to correct calls to be most perfect ie Ebrons catch) has made refs go from bad to worse.
IMHO replay should only overturn calls when there is clear undisputed evidence (like the PO in the championship game) and refs should be properly trained and paid.