Provide disabled people with different types of "marks" - from "postcard" to "non invasive stickers" - with printed words or signs saying: "can't approach this place" or "this place is inconvenient for disabled" or similar. They should have few of them always within reach (and more at home at stock).

Each time, during everyday activity, when experiencing problems, disabled people would "mark" that place by different means: either delivering postcard or asking others to deliver postcard to manager or by sticking "the message" in visible place. Marking would not be one action approach but consequently performed activity - kind of everyday duty.

The places where problem is most essential due to number of disabled people experiencing difficulties will keep getting "marks" permanently up to the moment when it is solved.

The pressure may be strengthen by occasional PR activity.