I have an old buddy from college - I'm 29, so it has been for a while. We met in the first couple of weeks and became friends.

We were both immature 18 year olds with troubled pasts, but as I gradually came to grips with this, and eventually came into a relatively successful STEM career, got into PUA (which my blue pill friend actually first introduced me to, and I scoffed at) and improved myself, my blue pill friend used his small PUA knowledge to get into a relationship with a girl that eventually turned into his surrogate mother, and who eventually dumped him after supporting him for three years (I also slept with her two months afterwards, which was a dick move, but this was years and years ago, and I apologized)

Anyway, my blue pill friend has moved several hundred miles away, but as he has no other friends except for his ex that he originally moved with when they were dating. I sometimes give him dating advice (which he asks for, knowing my skill!), hoping it'll help to take the redpill and also help him to try to advance his career.

No luck. I mentioned some advice to him that I had used on some girl I slept with. I called her, "19 year old redhead".

He immediately launches into creep shaming - "Wow, 19 dude? That's so creepy, nobody over the age of 24 should be dating a 19 year old. It's half your age plus 7 man"

I go on to tell him that, "Hey, the girl can make her own decision here. She's an adult. And none of the girls seem to mind."

"Well it's obvious that you're taking advantage of their inexperience."

"By besmirching their virtue or something? I'm not even understanding what you're saying".

"You're taking advantage of them."

I ask him to make a logical argument for this claim, rather than just an emotional kneejerk response.

He says, "Would these same girls date you at 30?"

To which I responded,

"Yeah probably, 30 year olds are desperate as fuck"

I tell him that I typically have a policy not to date any girls over 27, as they likely have baby rabies, and that I don't want to have any spinster's welps (at this point I'm intentionally using a bit of inflammatory language because he's acting ridiculous, but the policy is real). I also tell him that I've only slept with one girl over 25 this entire year.

He trots out the misogyny card and says that not every 30 year old woman wants to have kids. I point out that if a woman wants to have 2-3 of kids before she's 40 and take a year or two between them, AND date a guy for a few years, 29-30 is pretty much pushing the limit of when she needs to start. I also Google what percentage of American women have kids before 45 - it's 86%.

I tell him I have no desire to take a risk that dating a 30 year old entails (this is before even mentioning their diminished attractiveness - I suspected that argument would make his head explode).

He calls it "fucking MRA talk" (which I don't disagree with, but that would have been counterproductive in this situation to agree with that analysis - better to trickle the redpill to someone) - I deflect by saying that several of the girls had been ardent feminists, and he responded by saying that, "of course a woman would be fine with whatever you say, she's getting laid" - demonstrating a misunderstanding of how easy it is for women to have sex. I even ask one of the girls if she feels I abused her by fucking her, and text him the result. No budging. Strong emotions don't disappear with logic.

Anyway, you should not take this example as, "the best way to debate a blue piller" - it is certainly not that. I didn't succeed at convincing him, and tried to come at him with logic, facts and reason. Never a good approach when someone is being more emotional than not. This is just an example that even mentioning redpill ideas among some bluepills will get you shamed, and that they're entirely emotionally based. Not that that should bother you, but it is good to be aware of it.

EDIT:

Told the 19 year old that my friend called me creepy for fucking her, after fucking her today.

Her response?

"You are creepy, old man". Hahahahaha.