Oh, we definitely do. People commit huge crimes like flushing huge amounts of clothing down the line, which totally fucks up the pumps that move sewage up hills and over into bigger infrastructure. Many places used to have incinerators in the lines, but some people freak out that it’s bad for the environment (as if putting biosolid shit into landfills isn’t worse, which generates tons of methane). At least the incinerators used to burn up foreign objects and could run off the grease in shit and greywater alone.