Some stats:

US Police have taken $68 billion without due process from citizens in the past 20 years

https://boingboing.net/2020/12/21/us-police-have-stolen-68-b...

I personally know a lot of houseless folks who've just had their wallets and personal belongings taken from them making it nearly impossible to get other forms of help.

This is a massive injustice. Any way to fight this?

Unfortunately, this primarily affects houseless folks. And like most houseless people issues there's very little attention and resources aimed at this. I've put up houseless folks in Motel 6's before only to have the manager lock them out and keep their stuff, knowing full-well the police wouldn't help. I'd definitely encourage people to get involved locally in local mutual aid groups focused on houselessness. If for no other reason than to see it with their own ideas. Even people that grew up in poverty or lower class are often shocked to see the extent of human rights abuses happening under their own noses. After seeing it first-hand the will to tell all your friends and neighbors about it will find you

Legislatively, the usual suspects do have related campaigns (i.e. ACLU's Criminal Law Reform Project) but even those only work on this issue as a related tangent. Local prison abolition groups often have more local campaigns but the effectiveness of that strategy is really up in the air.

Some states have passed legislation against some of the worst abuses,[0] but I can tell you first hand that legislative victories rarely translate to on the ground changes in police behavior when it comes to houseless folks

[0] https://endforfeiture.com/legislative-reforms/#ended-civil-f...