haha he sounds like a very nice guy. probably why he has saw blades under the dock to take extra precaution nobody invades his privacy lmao!! how strong do you think those saw blades are? if its a good dock that holds nice bass. maybe get a bigger set-up with a steal leader , i mean a HEAVY ROD and a strong reel. and bend those suckers or rip them off!
but if the dock is crappy. just throw some bird seed on it , hopefully some geese or birds come through and crap all over it!