It should be possible to configure a node to ignore particular versionbit activations and not warn about them-- because they're not relevant to you.

Config could be something like:
vbaddignore=5:806400 # bit:height

It should also be possible to preset ignores as network parameters.

Testnet now has a testcase for this as there a long run of blocks with undefined bit 28 set.

It'll be useful to have this in place ahead of the wallet making use of VB warnings in the future (e.g. hiding unconfirmed txn and delaying confirmation indicators when a warning is active).