Maybe so, but buying an airline ticket in no way obliges you to use it.

3.3.3. If you have chosen a tariff that requires observance of a fixed ticket sequence, please note: if carriage is not used on all individual legs or not used in the sequence specified on the ticket with otherwise unchanged travel data, we will recalculate the airfare according to your altered routing. The airfare will thereby be determined in accordance with the fare you would have had to pay for your actual routing in your price group on the day of your booking. This fare may be higher or lower than the fare you originally paid.
If the price group you originally booked was not available for the altered routing on the day of the booking, the cheapest available former price group for your altered routing will be taken as the basis for the recalculation.

If on the day of the booking for your altered routing, a higher fare would have been determined, we will subsequently recover the difference taking into account the fare already paid. Please note that we can make carriage dependent on whether you have paid this difference in price.

If you have a refundable ticket, as defined by the fare conditions, and have still not flown a single segment of it, you may ask for a refund of the price of the ticket in accordance with fare conditions. This means that you will forfeit your entitlement to carriage.

This Article 3.3.3. does not apply to the carriage of passengers resident in Austria.