The decisison of fingerprinting logging seems to be little strict in a residential complex.
Unless there is great security threat such tracking of entry and exit looks bit excessive.
Check from our bye laws whether such vital decision can be made without approval of general body meeting.
If there exists such lacunae then challenge the decisison y filing a suit for injunction in the local court.
If it is a cooperative society then you can raise dispute to be adjudicated by the registrar of the society also.