People running data centers would not care about what you did for forwarding, as you could not affect he machines around you without specification to the data center. Every server is either outside there network (on the web) or is on a VLAN with your other servers (for bungee use on multiple machines). Therefor this wouldn't be a problem. If the company decided that they would want to limit that, than its a simple Boolean in the (perhaps) networking config, which provides the ports to forward, to auto forward, netty threads to use, bandwidth limits, etc.
Also for a VPS sponge server (theoretical), they would have trunk lines to prevent security breaches as well as ACL's to prevent the devices from talking to things they shouldn't be talking to.