I know IABU as there really isn't anything that neighbours could do about it!
Seriously though even if I leave an upstairs window open a crack this thing gets in, I just found it in my kitchen after I'd opened my patio by an inch to get rid of the smoke after burning the cheese on toast again
Don't get me wrong I like cats, I'd have one but I'm renting and not allowed on lease, I should probably admire the critter's determination and slender hips, neither of which I posess
My 2yr old is wandering around saying "sneaky cat" over and over. Someone please feel my pain