Replying to Construction site success?

So im wondering if anything like this has happened to any of you guys... So my friend and i are building a rail in my yard for this winter, and wanted to get the wood for free. We found a construction site where a house was being built and there was tons of wood and we found some 16 foot 2 by 4's laying around that didnt look like they were going to be used. When we got the van to go pick them up, there were some people there who we asked and they said sure and brought out more wood for us, gave us some tools, and even offered to supply us with nails and if we needed anything else to just come back. Did we just find the nicest workers ever? well anyway we ended up with enough wood to build 2 EXTREMELY sturdy 10 foot double barrel rails