There are some communities of disabled people in St. Petersburg who is trying to defend their rights and to influence on the situation with unavailable space.
"On wheelchair without borders" is a very active association. They've already done some events like a beauty contest for disabled girls. They organised some campaigns against high borders and bad rumps.
"Wheelchair riders of SPb" is a community for discussing based on social network. You can find a lot of useful information for movements, activities, health.
Unfortunately, disabled people have only 2 ways for solving their troubles: official letters the government and media.
Disabled people are not invisible. They don't have opportunities to move freely in St. Petersburg. And we can support them by paying our attention to the problem. Let's see! Let's discuss! Let's solve!