Fingerprint or Number
The fact that the fingerprint is processed and then stored as a number and therefore is 'safe' is actually a stupid argument. The number produced could actually relate to multiple fingerprints and is simply a way of allowing for a margin of error and to reduce the storage requirements. The number can be reverse engineered to produce a fingerprint. Now, this fingerprint might not be your fingerprint, but that is irrelevant. The fact is that this created fingerprint will process to the number recorded against you and therefore WILL identify itself as you. Whether it actually is your fingerprint or not is totally missing the point.
Therefore, given the numbers, it is possible to create a fingerprint for each person and the only way of knowing if it is really the persons fingerprint or simply one reverse engineered, is to re-fingerprint everyone and compare the two optically.
Ergo. Automatic fingerprinting systems are useless for security and can be simply bypassed using a small amount of knowledge and reverse engineering of the number.
Additionally, in order to make a system practical, the level of accuracy that can be achieved is pretty low. Therefore, getting two people with fingerprints that process to the same number is quite possible, especially when dealing with a large sample e.g. national etc.