Great Dave... A damning statement like "From what I've heard" (not even a first hand report) and you wipe out the reputation of my former home town on the internet in one fell swoop. All of that from your base of operations in the land of Mickey Mouse. Gee, what do those layover crews do for lunch in the trainman's room? They must fear for their life!
Yes, Patchogue has changed (primarily more of a Latino population in that area), but it's still safe to walk the buisness district, especially during the day. And you don't have to resort to the "Fear City" methods of walking in twos, putting your camera in a paper bag and brown bagging your lunch.
"Wah Lum's" is no longer, but the location is still a very fine Chinese restaurant on South Ocean Ave. Head north from the tower. That would be your closest to the station and the tower. I'm not sure of the pork store which would be just before the Chinese food.. and If you walk up a few more steps to Main Street (the four corners) and turn left ... you'll find the "Brickhouse Brewery" ($$)on the right side. If you turn right ..there's Polo (latino Chicken) and Trio's a (little $$$) on your left side.
Here's my recommendations .. continue north on South Ocean Ave. from the tower and cross over Main Street. On your right side will be some heavenly pizza and heroes at "Del Fiore's" and on your left about 50 paces more is a great Irish Pub called "Reese's".
As far as your safety, just normal common sense should prevail and I would not reccomend too many commercial (Patchogue or otherwise), non-residental areas around train stations after dark.
BMC - Life member, North Patchogue FD and columnist for the Long Island Advance, Patchogue's "Hometown" newspaper