Broadband useage - is there any point PlusNet start throttling?

[#1]

I am a new customer on the 80Gb FTTC service. With my last ISP there wasn't an easy way to see usage. With PlusNet I can easily login and see what it is. I noticed I went through a lot of data yesterday (just shy of 50GB)
That isn't the norm, but I do seem to use quite a bit. I don't use Bittorrent for anything. I do however stream in HD with Netflix and similar services. I also download games via Steam and onto my PS3. I download a game yesterday that was 12GB. (With my last ISP I downloaded Wolfenstein which was a 50GB game)
Is there any point I need to "watch it"?

[#2]

Not at all
You will get posters on here bragging about downloading the internet (slight exaggeration but not much) approaching 1,000GB
The reason for the usage details is that until relatively recently most/all/some of the products were data limited

[#3]

I would say my normal usage is between 500GB and 1TB per month.

[#4]

4 of us here, on average we use 350GB per month, but then again we're not not warez  monkeys.

[#5]

We don't watch live TV - everything we watch is streamed. (Nearly all of us HD streams)
We don't download any warez.

[#6]

Unlimited is definitely unlimited