Did you stop to think that maybe this Mom is trying to make things easier for Mom's like you, who have disabled children, to walk into any establishment and receive the same courtesies as any other patron? Maybe she's not just thinking about herself, but other disabled children also. How could she accomplish that? By affecting a store owner's wallet, so he won't be tempted to do the same thing to another disabled child. Considering you have a disabled child yourself, you should be thanking her, instead of condemning her.