I doubt this will happen, as i know most of the people who will be there are good friends and doing something silly like that wouldnt even cross their minds, but there's always a few people ur unsure of at a party, and i would just like to safeguard against morons who think it's funny to mess with peoples things.
So what do you think i could do? i was thinking plastic sheeting held down by rocks/bricks. do you think that would work?? Any other suggestions wld b great. thanks