Spice Jet Airlines — not allowing web check-in without additional payment for seats

Address:

Belgaum, Karnataka, 590016

Spiceject (Flights to hubli from bangalore) is not allowing web check-in facility unless one pays by choosing extra-fare seats. This is unfair. I am ok with any setas assigned as long as they allow web-check in. However, for choosing any seat, the airline's systems force you to come down to their counters at the airport.
I feel this is an unfair practice and harassment for passengers who want to avoid lengthy queues at the airport.