I don't understand this "instagram" thing. How would you know if you are being addressed and if so, can you either ignore it post by post / or filter out by terms / or subtract them as persons from your interaction list.

I think most "astrology fans" dumb it down disastrously. Obviously there are many more complex cycles and influences and one can appreciate one's traits in myriad ways, and develop strengths in both weak and strong areas. Fake astrology wouldn't be the only area where people waste their lives on commercialised gossippy shallowness.

It's your choice to make the effort or not (I wouldn't). Can't you get this stuff out of your face?

This topic went from opinions to racist jokes being told, whats the connection?

It depends on the people and the topic. If you feel that they would be open to discussing it then I think you should have that conversation, especially in person. But online, as you said so well, it's wasted energy.

You just say astrology is all taurus, that way you can beg the question and have your logical fallacy too.

This is what the emoji was invented for

I have often wondered if the planets and even the stars have some effect on us beyond tides? Something to do with gravity more than dark strangers meeting fat women on wet Thursday afternoons being dictated by the position of distant stars millions of light years away.
But with an expanding universe, the pull of those heavenly bodies on our earth diminishes continually. I wonder if astrologers take this into account?

Bottom Line: Racism

"I never laugh at racist jokes," I said loudly as others laughed. New to Wenatchee in 1984, my husband was introducing me to his old friends, long-time Wenatchee residents.

Everybody stopped laughing. "I was just kidding," the man said weakly. "Racist jokes are never funny," I replied firmly, looking him in the eye. He never told a racist joke around me again.

Ultimately, I made friends with progressive, college-educated people like me who moved here from another state.

My responses likely appear in reverse; if I disagree with what they are promoting, it loses my attention. They know I’m ‘aware’ of it, but my lack of response or rebuttal often feels as telling of my ..disrespect for the subject than going at them in public.

In private, or if confronted directly, I’ll be honest, and as unemotional as possible.

Whats your sign??........stop

When I am asked, I will say I am a Scorpio but to me it is just nonsense ... the same as religion.

I think the whole astrology thing is batshit crazy but I have another philosophy I live by. Don't fight battles you don't have to, and don't fight battles you can't win. Arguing with godbotherers, astrology believers and anyone who believes in any sort of "woo" fit into that basket for me. Generally I define woo as anything which can't be falsified or verified in a scientific fashion

Welcome to the asylum. Enjoy your stay.

I'll engage in discourse whenever I feel like it.
It doesn't necessarily have to be civil.

I'm pretty tired of being "nice".

Always without hesitation is the best policy!!!

If we as as country would have actually refined our election system we would not have been in this overtly over the edge ruination of our country by these Obstructionist republican fascists who are own by the wealthy and their corporations!!!

In the specific context you mention - a friend's post on social media - I would probably just sigh and move on. Any comment of mine would probably come off as snarky.

If someone actually ASKS me my "sign" in online conversation, then I figure that I have a little more freedom. To shut that line of inquiry down, I might say "A positive" (since my blood type might actually be USEFUL information). If I'm feeling more talkative, I might say, "You know, the small but close mass of the obstetrician actually exerts more gravitational force on a newborn than the massive but distant stars do" (my friends already know that I'm a nerd.)

You can probably see where this escalation of engagement is headed: the in-person conversation! I figure that in-person conversation is made for this sort of discussion; I don't hold back then.

ok, here it goes, astronomy is as equally as bullshit as religion, nobody can decide when but you.

Don't start to debate, just state your position in a positive way, in other words don't say. "No I do not agree with that." Instead say. "I am finding that the freedom, and positive personal growth that I gain from not engaging with astrology right now are too valuable to loose." Then leave it to them to start the debate if they want to, which they probably won't, but by the time they have heard you say something like that several times, they may just start to question for themselves with out you having to do anything. Example wins more converts than debate.