An old buddy of mine commented once on the amount if minor havoc you could wreak with a handful of chain bike locks. Cheap, wrap around some door handles and lock, walk away. Yeah, somebody can bust out a bolt cutter, but for the amount of challenge to remove it, the low cost per use, and the speed of application, it’s pretty impressive for minor mischief.

Relatively harmless, too, as long as you aren’t doing any additional nefarious shit. Might work for some gated community gates.