I'll state the obvious, since no-one else has...
o If you annoy/injure a burglar - he may take revenge
---- vandalism of car, house, you, family
---- bricks to arson to put it bluntly
o If you discourage a burglar - they choose an easier target
---- a determined thief WILL get past anything
---- break-&-enter, with a gun, to take car keys

My suggestion would be "plastic wire/spikes" plus anti-climb
paint because they truly utterly hate the grease-paints etc. A
notice to the effect that anti-climb paint is in use discourages.

Then ensure locks are up to scratch, plus visible ideally.
(I mean patio doors with drop-down or slide-over beam).

Then security PIR - although there are 2 schools of thought re
they provide a deterrant or they provide sharp shadow places
to hide and turn off once someone stops moving vs always-on.

UV spray markers are another idea, personal & fitted.
Never seen a fitted one, but it would be useful - next time they
go past appropriate lighting they glow & it takes time to get off.

Most obviously have tools where they are not visible and sheds
that basically have minimal windows re making entry harder.

Wire that cuts has the advantage of leaving DNA, but that is
likely to occur with most methods of entry. Make sure the
backdoor can not be kicked in if even remotely secluded,
and realise uPVC windows are not exactly strong things.

Not difficult to rig an alarm to dial a phone, or for a mobile
to be wired to turn on things internally or turn a car off etc.
Just avoid the temptation to link it to a large quantity of TNT.

Now I wonder if a rail gun would come under Part P...
--
DB.