Most of these people probably are well-intentioned, but that doesn't stop this from being base-level activism that is entirely performative and more focused on making themselves look and feel good than on actually helping people.
I want you to think for a second - what does this actually do? Because it's not a sneaky way to help people. Everyone knows what it means and you've just announced to everyone that you're a person to watch. That if someone suspected of having an abortion shows up to your house with you, now they have proof and evidence that that is why they were there. Some of these people might start off as well-intentioned, but as soon as their safety is on the line, they won't hesitate to sell you out.
And I can bet you, that some of these people are not well-intentioned. Some of these people will turn you in as soon as you reach out. Some of these people will try to persuade you not to get one (you know, like the Crisis Pregnancy Centers that imitate abortion clinics but really just push birthing as the only option?)
So what can you do?
Go through an abortion network. Go through agency channels. These people are trained and vetted. This is their job and they are going to be prepared a whole lot more than some random person online.
If you need to find one or are visiting a website, I suggest using a VPN. It's not a perfect safety measure, but it does give you a higher level of protection than without.
Resources:
Abortion Funds
National Abortion Federation