Has anyone used this, is it actually safe? I am always worried with these types of apps as you never actually know if it is safe. I am a single mum of one and lost the majority of my friends when I had my little girl/moved. So I thought this might help with meeting up with mums and finding children of a similar age for my little one to play with. BUT, there is this huge worry of I don't want to put my daughters or my life at risk if any old weirdo can join.