> Should I be thrown in jail if I express a "bad" idea?
If, say, you're aware that your readers have a tendency towards "exuberance" when it comes to dogpiling / harassing / doxing / etc. people you call out on your blog and your "bad" idea expresses a wish that someone has a very bad time of things, yeah, you should definitely be looking at consequences (perhaps not jail-level, mind) for that idea.
(cf people like Gervais on Twitter who have a consequence-free dogpile mob ready to relentlessly harass anyone criticising them. Or POTUS, in the current instance.)
If, say, you're aware that your readers have a tendency towards "exuberance" when it comes to dogpiling / harassing / doxing / etc. people you call out on your blog and your "bad" idea expresses a wish that someone has a very bad time of things, yeah, you should definitely be looking at consequences (perhaps not jail-level, mind) for that idea.
(cf people like Gervais on Twitter who have a consequence-free dogpile mob ready to relentlessly harass anyone criticising them. Or POTUS, in the current instance.)