I am a beginning blacksmith and would like to forge with railroad spikes as I have in the past (with legally obtained one's). I live near a railroad and I often see homeless people collecting things, I was wondering if it was legal to collect a few (like less than 10 once every few months) to keep, not to sell. Would it matter if I stayed farther away from the track, or sticked closer to the road? Any advice whatsoever would be appreciated