Paul Farquhar
Legend
If the players go into a magic shop, I generally hint that it is well defended, with shadowy stone statues in the corners (which detect as magic if the PC has detect magic running) and suchlike.Thing is with things like robbing shopkeepers, it's not just the GM's fun that is at stake. It's potentially destructive of the other players fun too.
Of course there's better ways to handle that situation then railroading. But it isn't necessarily something the GM should just be a neutral arbiter of either.
That saves on the "stone golems pound you to death the end" outcome.