if((Get-PSSnapin "Microsoft.SharePoint.PowerShell" ) -eq $null) { Add-PSSnapin "Microsoft.SharePoint.PowerShell"};

[System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint")
[System.Reflection.Assembly]::LoadWithPartialName("Microsoft.Publishing")
[System.Reflection.Assembly]::LoadWithPartialName("System")
$site = new-object Microsoft.SharePoint.SPSite("http://mysite");
$web = $site.OpenWeb()
$fileDWP = $saveFolder + "myCustom.dwp"
$errorMsg = ""
[Microsoft.SharePoint.SPList]$wpList $site.GetCatalog([Microsoft.SharePoint.SPListTemplateType]::WebPartCatalog)
$fileStream = ([System.IO.FileInfo](Get-Item $fileDWP)).OpenRead()
[Microsoft.SharePoint.SPFolder]$wpFolder = $wpList.RootFolder
[Microsoft.SharePoint.SPFile]$wpFile = $wpFolder.Files.Add("myCustom.webpart", $fileStream, $true)
$wpFile.Update();
[System.Xml.XmlReader]$xmlReader = [System.Xml.XmlReader]::Create($wpFile.OpenBinaryStream())
[Microsoft.SharePoint.Publishing.PublishingWeb]$pubWeb = [Microsoft.SharePoint.Publishing.PublishingWeb]::GetPublishingWeb($web);
[Microsoft.SharePoint.SPFile]$defaultPage = $pubWeb.DefaultPage;
[Microsoft.SharePoint.WebPartPages.SPLimitedWebPartManager]$wpManager = $defaultPage.GetLimitedWebPartManager([System.Web.UI.WebControls.WebParts.PersonalizationScope]::Shared)
$myCustomWP = $wpManager.ImportWebPart($xmlReader,[ref]$errorMsg) $wpManager.AddWebPart($infoWp, "Right", 1); 
$fileSream.Close()
$xmlReader.Close()
$pubWeb.Close()
$web.Dispose()
$site.Dispose()
write-host "Done"

User strategies are uses by service profile for user profil to activate or deactivate some functionnality for users and MySites.

Here is 3 ways to proceed:

Central Admin

C#

using (SPSite site = new SPSite("http://myAdminUrl"))
{
     using (SPWeb web = site.OpenWeb())
     {
        SPServiceContext serviceContext = SPServiceContext.GetContext(site);
        UserProfileManager usrProfil = new UserProfileManager(serviceContext);
        PrivacyPolicyManager prvPolicyMgr = usrProfil.GetPrivacyPolicy();
        PrivacyPolicyItem[] pPolicyItems = prvPolicyMgr.GetAllItems();
 
        foreach (PrivacyPolicyItem policyItem in pPolicyItems)
        {
          if (policyItem.Group.Equals("appartenances", StringComparison.InvariantCultureIgnoreCase))
          {
              //Check if the Privacy policy is deactivated
             if (policyItem.PrivacyPolicy == PrivacyPolicy.Disabled)
               continue;
 
             policyItem.PrivacyPolicy = PrivacyPolicy.Disabled;
             policyItem.Commit();
          }
       }
    }
}

PowerShell

if((Get-PSSnapin "Microsoft.SharePoint.PowerShell") -eq $null)
{
   Add-PSSnapin Microsoft.SharePoint.PowerShell
}
 [System.Reflection.Assembly]::LoadWithPartialName("Microsoft.Office.Server")
 [System.Reflection.Assembly]::LoadWithPartialName("Microsoft.Office.Server.UserProfiles")
 [System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint")
 [System.Reflection.Assembly]::LoadWithPartialName("System")
 
$site = new-object Microsoft.SharePoint.SPSite("http://mySite")
$ServiceContext = [Microsoft.SharePoint.SPServiceContext]::GetContext($site)
$web = $site.OpenWeb()
 
$upm = [Microsoft.Office.Server.UserProfiles.UserProfileManager](Microsoft.Office.Server.ServerContext]::Default)
 
$prvPolicyMgr = $upm.GetPrivacyPolicy()
$pPolicyItems =  @($prvPolicyMgr.GetAllItems())
 
foreach($policyItem in $pPolicyItems)
{
  if($policyItem.Group.Equals("appartenances",[System.StringComparison]::InvariantCultureIgnoreCase -and $policyItem.Privacy -neq [Microsoft.Office.Server.UserProfiles.PrivacyPolicy]::Disabled)
  {
    $policyItem.PrivacyPolicy = [Microsoft.Office.Server.UserProfiles.PrivacyPolicy]::Disabled
    $policyItem.PrivacyPolicy.Commit()
  }
}
 
$web.Dispose()
$site.Dispose()

For this script, you'll need to run powershell with sufficient privileges =>Run powershell with elevated privileges

Sometimes,it depends on what you need to do, but you'll need to run power shell with elevated privileges.

You can run power shell with elevated privileges with this command line:

runas /noprofile /user:YOURUSER "C:\windows\system32\windowspowershell\v1.0\powershell.exe -NoExit & 'c:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\CONFIG\POWERSHELL\Registration\SharePoint.ps1