I remember in '96 my friends and I would steal the "Dick Swett for Congress" campaign signs posted along Routes 101 and 114 in Manchester. Good times.
I have friends in Greeley, CO who, during the last major election in 2004, took tons of signs (mostly Republican, on pure coincedence). The story ended up on the local NBC news station about how Democrats were stealing Republican signs. I'm still laughing.