This will disable all pois
new google.maps.Map(mapDiv, {
center: new google.maps.LatLng(...),
zoom: ...,
mapTypeId: google.maps.MapTypeId.ROADMAP,
styles: [
{
featureType: "poi",
stylers: [
{ visibility: "off" }
]
}
]
});
Have a look at the reference for disabling/enabling certain types
http://code.google.com/apis/maps/documentation/javascript/reference.html#MapTypeStyle