That's against their will, but I'm not sure that letting someone to defecate in the middle of the streets is any good either

Homeless people don't defecate on the streets; alcoholics, drug addicts and mentally ill people do. Those people need help, not to be sent off so they're out of sight.

They are supposed to be sent to forced labor to chemical plants and other harmful conditions work (Belarus also has a lot of work to do on contaminated Chernobyl lands, so maybe there as well).

Thing is, bumming is a crime. As far as i know, it is a felony in just about every country. It is just that cops are closing their eyes on this crime so frequently that most people even forgot that it was against the law.