Reminds me of a sign I saw outside a deli that read, "Beware! Cigarettes and Beer." I thought it was nice of them to warn me.
How about a sign that just says 'Beware!' with no explanation. Is it the frumious bandersnatch? Nobody knows.I like the sign with the Beware this sign has sharp edges and in really tiny letters, oh yeah and the bridge ahead is out.