I read about the mistaken shooting of a young Brazilian in London with a sinking heart. Will young men who look "Pakistani" be cornered and checked by police if they display any hint of "suspicious" behavior? Will security cameras hone in on their every move? "Welcome to our world," I can hear young African-American men saying. Should South Asian guys be prepared for the possibility of racial profiling or harassment? If so, how and when? Or am I being unnecessarily paranoid?