I do tend to see all the potential problems with a thing/scenario, rather than focusing on the likely positives. This can be useful at work and in other circumstances where it gives the chance to mitigate probable issues. But it does mean I’ve got more concerns floating about my head each day than anyone reasonably needs. (I spent a whole commute last week considering how I’ll cope when I someday get sent to prison for a crime I didn’t commit.)
But discovering the odd smelly surprise probably never really hurt anyone. Maybe it's even character building. It would obviously be really nice for the kids to have a playhouse. And I refuse to live in fear. It’s like the war on terror*. If we’re scared to go on buying playhouses as normal, then the pooping-drifters win.
Another slightly more likely unlikely scenario, given their huge numbers in our area and recent instances of attacks on humans, is that one morning my little boy opens the playhouse door to find a bewildered fox in there. Still a long-shot though - I just did a google search for "Playhouse Fox Incident" and found no wendyhouse-specific cases to back up my apprehensions.