VPN IP blocking-can veiwing be allowed?

Once you have a VPN its probably most peoples habit to leave it running all the time.

But the forum here is blocked to basically all the VPN I am using. This is obviously to stop spam.

But would it be possible allow just viewing of the forum on most blocked ips?

Obviously if there are to many downsides or its too difficult then don't bother.

I suppose it might also cause confusion as to why people can't post at some point.

It is only a minor inconvenience but it still would be nice to attenuate it.