Do you often look at caller ID and not answer?

I haven't set up caller ID on my landline phone, but I have always had an unlisted number, so the robo calls and spam calls are few.

I don't have a landline.
If there is a call to my cellphone, and it isn't someone in my directory ... and I'm not expecting a call ... I disconnect the call before it goes to voicemail.

Yes I do that quite often!

I look at Caller ID and answer, "Radiology, may I help you?.     Made a big difference - I rarely get unwanted calls now.

Seriously, on my cell phone
if I don't recognize the caller ID,
I do not answer....99.9% of the time
it is something to avoid.
If they need to get me a msg...
no problem leave a MSG

Most of the time.There are a few places that call and the ID says unknown caller and it really is a business I needed to speak with. One was a clinic who hung up on twice. Oops.

yes i check. the other day they call me trying to sell me their internet, and i said 'no'.

yes
I block spam on unwanted calls

I have to answer whether I recognize the caller or not. 

We have Nomorobo on our landline and mobile lines.  That gets rid of a lot of nuisance callers.  If some numbers that I don't know get through .. I usually don't pick up and just wait for them to leave a message.  If they don't, then it probably wasn't anything important anyway.

I talk by text so if somebody calls it goes to the automated message that says this mailbox has not been set up.

Daily.  They are welcomed to leave a message.

sometimes i answer and when they say how are you i say i'm horrible thanks for asking then i hang up 

I do now, since a business I signed up with calls me constantly.  6 calls just today.  They call from strange numbers or a number that shows their name.  This has been going on for months.  Now I've had enough.  I will be logging the calls daily and in a couple of months I'll file a restraining order against them. They want me to sign up for a service they offer.  I have declined more than once but they won't stop hounding me.  I even called the main number and complained, the calls keep coming. 

Always.  I only have a landline and 99.999% of the calls on it are SPAM.  

I google the number. Most of the time it is not found. All the other calls come from the grade school in the next town, so I call and tell them to remove the number from their records.

yes!! i must...i have alot of people i don't want to talk to also there's alot of scams

Don't have caller ID on our home phone.
We just handle each call as appropriate.