artifact found: campaign sign

an extremely large candidate's sign appeared on our front lawn this morning. without warning. i always thought they had to ask your permission first, but apparently not. perhaps we were on a list from the previous owners of our house, but still. it's funny because there were smaller signs they could have chosen, but no we got the BIG one. so now i guess we are keeping our neighbours wondering, as i am sure they noticed the huge sign and now we've removed. now even if i was considering voting for that party, i might not based on the sheer rudeness of unauthorized lawn domination. has this happened to anyone else?