Nah. not at all.
Random acts of violence happen to anyone, Had my scalp split at 9 by a group over the MAX line overpass, ( I hesitate to say gang, but they were all in the local HS's football jerseys at the least)
There are a rash of daytime burglaries in my neighborhood, people waiting for folks to leave in the morning and going right in, 10 days ago someone cleaned my backyard out of deposit cans that my Eldest collected for extra pocket money... they were right under her bedroom window...
Few years ago I caught a guy trying my back kitchen door, My house has no internal staircases, I come out the basement door and there's a guy with his hand on the doorknob and a very sudden Stammer-filled stream of excuses.
Dress for the occasion, I don't have a mousegun, so would probably be unarmed at the pool., but won't hold it against folks who do.
I might give you a funny look if you come out in a SASS rig and Skivvies, but it IS Portland... Home of the Unipiper. I'd probably ask you about the gun itself.
http://www.youtube.com/watch?v=75QdvbtZ4W0
And yes, he goes around town Piping, on a Unicycle. Just cruises on past you. Near my kid's school too.