To those glider pilots out there:
Below 10,000 ft I have a lot of bright lights turned on in order to allow other traffic seem me - that includes you. I also carry a Mode "S" transponder that allows other aircraft to "see" me on a psedo radar screen.
What do you have - nothing! You do not have transponders, an few if any have radios. Not only that, you usually paint your aircraft pure white which also minimises your visibility. Perhaps you should be a little more considerate of the threat you pose to other traffic by being so inconspicious.
I am also on an IFR flight plan, and adhering to it, therefore my workload in the cockpit precludes me from looking out the window all the time. I will take whatever action is necessary to avoid all the traffic I see, but given the difficulty posed by gliders - their size, slim profile, colour, lack of lights, don't be surprised if you are never seen by an airliner crew.
In the interest of self preservation I suggest that you assume that an airliner crew cannot see you regardless of right of way rules, and give them a wide berth.