Finally found out what was causing the spikes on my graph. You can see the last couple of spikes going through yesterday evening.
It was the guy next door using my FON hotspot for facilitating his cloud up and downloads. He was uploading and downloading large graphics files for his business at regular intervals, driven by his software. He was tired of using his BT ADSL connection and couldn't believe his luck when he discovered the available bandwidth on FON. He got free access because he has BT FON WiFi. It's funny because from time to time my android and a laptop automatically log onto his BT FON when I'm on his side of my house.
I have no problem with this. I should have checked my FON connection log. Up until now, no one has used my hotspot! Running it just gives me free access to BT FON and millions of FON spots world-wide.
I told him he can carry on using my FON spot, but I will be dropping the available bandwidth; still way above what he gets with BT.
