Do you think that saying you want to take stuff from or harm rich people without getting into specifics about a particular person will ever get you into legal trouble?

I imagine it depends a lot on the extent to which the legal jurisdiction I'm in at the time is influenced by rich people, and the extent to which those rich people take my having said that seriously. In most jurisdictions and for most audiences, very likely not, unless I'm a far more compelling speaker than I think I am.