As I'm a part of the Law community I can't advocate revenge (officially )
HOWEVER
id rather make her smell urine for a month >
1 Report the matter
2 Make a claim for damage to your bike - civil Court
3 Get a distance order to keep her away from you or your property.
THEN when the fuss has died down...............

Some years ago, I had a neighbour who wouldn't listen to reason.
We minced up some sardines (pilchards) etc and dumped them into the air vents on the car. IT OF COURSE MAKES ITS WAY DOWN INTO THE HEATER/FAN UNIT........
I will GUARANTEE that the smell will remain for at least a month.
If you're going to have a little revenge, MAKE IT WORTHWHILE
And do it at the local Mall where she shops, so it can't be pinned on you.

 

ditto on shadows points..and for sure take the appropriate action. but lets for a moment look at it from a phsycoloical stand point. this human being is so fueled up (have you been pissin her off, really, honestly..lol) about you to the point of performing such a scary and malicious act. imagine yellow~~ this woman and you just are from opposite polarities but yet she is there. what is it that triggers her to be so intense on you. a suppressed young adult life and you represent freedom but the lost of freedom she experienced left her scared and now in her sinking winter of her life she is trying to stop yours. what can silence the scary passions of the scary neighbor. "gotta try a little kindness and open up the blindness" but still take her to court for damages.but afterward offer her to take her for a double on your bike. let her finally fulfill her inner cravings and maybe vanish in the distant sunset. lmao~~sry