VixTD, on 2013-September-04, 07:10, said:
- If I open 2NT with a five-card major and partner responds 3♣ I alert, because we are playing puppet Stayman.
- If I open 2NT with a four-card major and partner responds 3♣ I announce "Stayman", because we are playing ordinary Stayman.
Without wanting to take this suggestion seriously: a similar abuse is possible over 1NT where we have had announce 4-card / alert 5-card stayman for 7 years, and (strong) 1NT with possible 5-card major has become common.