that's a good question, and it really depends on the ratio of seniors in your neighborhood. The more there are, the more likely your living near a motor home park or similar establishment; following that line of thought we can assume you could have a old folk infestation in the rafters and walls. They'd chew away at the wood, but they haven't any teeth, so you'll just hear soft moans from your walls.
when your sleeping, the old folks will come out and use your computer for on-line shopping and disclose their credit card number for all to see. However, they rely heavily on cookies to remember passwords(heck they rely on relatives to remember their last name sometimes); thus the requirement for a repair install and deleting of the cookies. without access to online shopping, the seniors will become confused, and fixated on your tool shed. Care should be taken to sharpen your tools in the shed, as they often start fighting each other randomly. This helps you financially since you could sell tickets to your "Senior Scuffle" games, which only lasts until the police arrive and break up the party, at which point you can claim ignorance on the whole issue.