I can use my disability money on anything I want. There is no laws or rules against that.
There are laws that prohibit its use for certain things, eg. gambling. It has been discussed here.
Unfortunately there aren't laws like that. However, if drugs/alcohol contribute to the disability then the checks will stop coming. In addition, you must be receiving treatment to keep getting money (unless you have a good excuse).
We don't do drugs or drink. Me and my mom both have bipolar and bad backs. No treatment.