Do I take it, Btline, that you would refuse W&S▸ passengers and trainspotters access to platforms at gated stations?
Yes! If you don't have a ticket - you should not be allowed onto the platform. Go and buy one like everyone else...
If you can just get through willy nilly as people on here seem to suggest

, the whole point of the barriers (to ensure as far as possible that
everyone boarding and alighting from trains at the station has a ticket) is being compromised, and you might as well get rid.
If you are not travelling - get a platform ticket/ the cheapest ticket possible.
As far as gating is concerned: Of course, in an ideal world - 100 % of stations would be gated. But this is not practical. So gate every major station. Most termini (including ALL holiday resorts) and major interchange points should be done.
That is what
LM▸ have done. They have created a "ring of steel" around Birmingham, by gating the main 5 central stations. From that, they can maximise revenue protection whilst minimising the no of barriers.
Ticket checks should NOT be reduced - indeed, with less people wasting guards' time by buying tickets onboard - even more and enhanced checks should be able to be carried out.