If someone
can back their opinion up, and tell people why they feel how hey
feel, I see no reason why people should be mean about that.
However, If you say something hurtful or inappropriate just for
the sake of starting a sh*t storm and call it your
"opinion" then you shouldn't be surprised when
people tell you to f*ck off, or shut up and keep it to yourself.
All in all, if your opinion is informative and useful in any way,
or you have a way to back it up, go ahead and say it! But if you
are just talking to hear yourself talk, then
stop.