Socialism really has nothing at all to do with stop and frisk.
But anyways in regards to your comment on its effectiveness:
"A new report released by the New York attorney general’s office on Thursday highlights just how ineffective New York City’s “stop-and-frisk” policy, which randomly targeted millions of minority residents, has been. According to the analysis, just 1.5% of all stop-and-frisk arrests resulted in a jail or prison sentence. Just one in 50 stop-and-frisk arrests, 0.1%, led to a conviction for a violent crime or possession of a weapon. Over the past decade more than 4 million New Yorkers have been targeted under the program. The vast majority of those stops occurred in mostly poor, mostly minority neighborhoods. Between 2004 and 2012, 4.4 million people were stopped. A weapon was found in less than 1% of the cases"
New analysis shows just how ineffective stop-and-frisk has been | MSNBC
"In 2013, prior to New York effectively ending stop-and-frisk, David Greenberg of New York University found “no evidence that misdemeanor arrests reduced levels of homicide, robbery, or aggravated assaults.” Since the end of stop-and-frisk, crime has remained at historically low rates or even dropped further. In 2015, murder rebounded slightly from its all-time low in 2013, though the first quarter of 2016 was the lowest on record."
Stop-and-Frisk: Trump's Bad Idea for Fighting Crime - The Atlantic
Stop and frisk dropping but still ineffective | Prison Policy Initiative
"Schneiderman's study found that 0.3% of the 2.4m stops led to jail sentences of more than 30 days, and 0.1% led to convictions for violent crime. It also found that there had been a “sharp uptick” in litigation costs for the city due to the cost of defending the NYPD from lawsuits."
https://www.theguardian.com/world/2013/nov/14/stop-and-frisk-new-york-conviction-rate
"Last year, the NYPD stopped and interrogated people 685,724 times, a more than 600 percent increase in street stops since Mayor Bloomberg’s first year in office when there were only 97,296 stops. Nine out of 10 of people stopped were innocent, meaning they were neither arrested nor ticketed. About 87 percent were black or Latino."
New NYCLU Report Finds NYPD Stop-and-Frisk Practices Ineffective, Reveals Depth of Racial Disparities | New York Civil Liberties Union (NYCLU) - American Civil Liberties Union of New York State
Bottom line is its not effective, and actually undermined how the police was/is viewed in the community.