Bit of background- there are a bunch of 7-10 year old children who live right at the closed end of our cul de sac. We live half way down- around 8 houses away. We've had words a couple of times in the past as they play outside our house and have done things like pulling branches off trees and taking rubbish out of bins and leaving it on the floor. Each time we have been nice and just asked them not to and explained why. They also like to play football outside our house, we ask them to play outside their own house (so it's their parents' cars/windows that get hit, not ours!).
One of the children has a habit of just leaving his bike wherever he happens to get off it- usually on the pavement, behind parked cars, etc. However we came home to find it on our front garden. We have a small garden with no fence or anything around it (new build and we're not allowed to put up a fence), but it's clearly a personal garden not communal, as we keep it weeded and have planted bushes so it looks different to our neighbours'.
We picked the bike up off our garden and put it on the pavement next to our wheelie bin (due for collection). One of the other children saw and jumped on the bike and rode off shouting to his friend (the bike's owner). So we said something along the lines of 'Next time it goes in the bin!'
So WIBU to actually follow through with the threat if he leaves his bike on our property again?