[JTon]

You can get professionally printed proxies [1]. I've been told there's often a "don't ask, don't tell" policy around many unofficial mtg tournaments regarding proxies. It obviously upsets some people, but others see it as requirement for new players to enter legacy format (and keep it alive).

[1] https://old.reddit.com/r/bootlegmtg/wiki/index

[JimWestergren]

In the old school community: counterfeits absolutely not ok. Proxies normally ok except in some tournaments.

[JTon]

I've been told that many players buy counterfeits specifically for old school tournaments so they don't put their very expensive pieces at risk to theft or damage. I can't verify this, but it makes a lot of sense to me ¯\_(ツ)_/¯