Hi C152
I've not been spotting quite as long as you sir, but I'm not far off!!
I'm pretty certain you get 12 months free network coverage (delayed?) when you purchase a box, and although sites like Flightradar do give useful coverage, it doesn't show local non ads-b traffic which your own personal box will do (light a/c,biz jets,military,Dash 8's,Embraers etc etc) so there are many benefits from having your own box
As you'll see from the arguement.............oops sorry debate on here, there are pro's and cons of subscribing for additional time on the network.
As regards banning someone, keep on board for a few days, and you'll see the sort of stuff that goes on!! ;-)
Hope you take the plunge!
rgds
Rich