Hi @Tiare-and-Alfi0
Not all guests, specially kids, will be well behaved and respectful with you and your belongings... One day you may host the best guest ever and the next day you may get this kids...
Try to keep valuable and sentimental items away from all guests AT ALL TIMES... They are not covered by the host guarantee...
If your guests are not exceeding your maximum allowed of 4 people you have no grounds to complain... as you do not charge extra $$ for extra guests, 1 or 4 is the same price...
After they leave check to see if there are damages and submit the claim if you find anything bad, damages with more than $300 requires a police report...
If they are exceeding more than 4 guests you may be able to evict them from your house or demand more money... In Florida there is a maximum of 1 guest for every 150sq/ft ("All units must comply with the requirements of NFPA 101, the Life Safety Code".)
Usually we leave our guests at easy when they are at our house... If there's any problem we file a claim with airbnb after their check-out...
Luis