Those signs are all along the parks on Pennsylvania around the 500 block of SE and Seward Park. Actually have a snap of one here: http://flickr.com/photos/mkinne/2305746773/

The real reason is the parks are home (which includes recreational or medicinal drinking) to many of the homeless in the summer months, and there is also penchant to see Hill staff and Marines crowding the streets and drinking fairly heavily on warm evenings.

Personally, I just like the sign’s 70′s feel.

ontarioroader,
haha that makes me think of an Onion article titled “Brown Paper Bag Baffles Cops”

My old office got busted by the cops for bringing along beers to a softball game — fortunately they just told us to get rid of it (it is illegal to drink in public parks) and left it at that.

Me and my crew used to get all tore up on Grey Goose martinis and bust people in the head. So, its probably my fault.

As someone who walks past that park to and from work those signs have been around for quite a while. However, there is/was a non profit that feeds the homeless on 8th and Penn and that has turned into a bit of a homeless park at least the summer. So now – yes definitely I think those signs might be appropriate. Some things as obvious as they may be still need to be said.

Interestingly a few months ago two trash can were set on fire. One was totally melted (the remains are still is there) – and while I don’t know who did it.