It was raining. It wouldn’t look suspicious to anyone to see someone wearing a hood in the rain. What would look suspicious is seeing a guy meandering around the streets and walking between buildings in the rain.
That’s not profiling.
If we want to believe DeeDee was on the phone with Trayvon (and the records indicate she was on the phone close to that time), he was walking under the overhangs to stay out of the rain. Those overhands are about 18" according to Hal Uhrig, Zimmerman's first attorney. That's slinking along the back windows of a building as much as meandering (Zimmerman said walking in circles).