A good question. You can always buy your way back in with say a Rift or a Vive for yours truly
Seriously, usually a ban comes from a race incident of some sort and is for 30 days. During this time you are not allowed to sign up for any races or use any of the RD servers. You can continue with your day to day activity on the forums. If you get a ban from the forums, that is different all together. That usually gets you booted from participating in anything for 30 days. Fortunately this doesn't happen very often
Most of us here have no problem with communicating with others since that is why we are here.....the Social aspect, plus some great mods from great Modders.
Hope this helps